enhance(backend): improve cache

32 files changed, 263 insertions, 447 deletions

diff --git a/packages/backend/src/core/CacheService.ts b/packages/backend/src/core/CacheService.ts
index 887baeb2c2..f0c311b9b0 100644
--- a/packages/backend/src/core/CacheService.ts
+++ b/packages/backend/src/core/CacheService.ts
@@ -1,6 +1,6 @@
 import { Inject, Injectable } from '@nestjs/common';
 import Redis from 'ioredis';
-import type { UserProfile, UsersRepository } from '@/models/index.js';
+import type { BlockingsRepository, ChannelFollowingsRepository, FollowingsRepository, MutingsRepository, RenoteMutingsRepository, UserProfile, UserProfilesRepository, UsersRepository } from '@/models/index.js';
 import { MemoryKVCache, RedisKVCache } from '@/misc/cache.js';
 import type { LocalUser, User } from '@/models/entities/User.js';
 import { DI } from '@/di-symbols.js';
@@ -16,7 +16,12 @@ export class CacheService implements OnApplicationShutdown {
 	public localUserByIdCache: MemoryKVCache<LocalUser>;
 	public uriPersonCache: MemoryKVCache<User | null>;
 	public userProfileCache: RedisKVCache<UserProfile>;
-	public userMutingsCache: RedisKVCache<string[]>;
+	public userMutingsCache: RedisKVCache<Set<string>>;
+	public userBlockingCache: RedisKVCache<Set<string>>;
+	public userBlockedCache: RedisKVCache<Set<string>>; // NOTE: 「被」Blockキャッシュ
+	public renoteMutingsCache: RedisKVCache<Set<string>>;
+	public userFollowingsCache: RedisKVCache<Set<string>>;
+	public userFollowingChannelsCache: RedisKVCache<Set<string>>;
 
 	constructor(
 		@Inject(DI.redis)
@@ -28,6 +33,24 @@ export class CacheService implements OnApplicationShutdown {
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
+		@Inject(DI.userProfilesRepository)
+		private userProfilesRepository: UserProfilesRepository,
+
+		@Inject(DI.mutingsRepository)
+		private mutingsRepository: MutingsRepository,
+
+		@Inject(DI.blockingsRepository)
+		private blockingsRepository: BlockingsRepository,
+
+		@Inject(DI.renoteMutingsRepository)
+		private renoteMutingsRepository: RenoteMutingsRepository,
+
+		@Inject(DI.followingsRepository)
+		private followingsRepository: FollowingsRepository,
+
+		@Inject(DI.channelFollowingsRepository)
+		private channelFollowingsRepository: ChannelFollowingsRepository,
+
 		private userEntityService: UserEntityService,
 	) {
 		//this.onMessage = this.onMessage.bind(this);
@@ -36,8 +59,62 @@ export class CacheService implements OnApplicationShutdown {
 		this.localUserByNativeTokenCache = new MemoryKVCache<LocalUser | null>(Infinity);
 		this.localUserByIdCache = new MemoryKVCache<LocalUser>(Infinity);
 		this.uriPersonCache = new MemoryKVCache<User | null>(Infinity);
-		this.userProfileCache = new RedisKVCache<UserProfile>(this.redisClient, 'userProfile', 1000 * 60 * 60 * 24, 1000 * 60);
-		this.userMutingsCache = new RedisKVCache<string[]>(this.redisClient, 'userMutings', 1000 * 60 * 60 * 24, 1000 * 60);
+
+		this.userProfileCache = new RedisKVCache<UserProfile>(this.redisClient, 'userProfile', {
+			lifetime: 1000 * 60 * 30, // 30m
+			memoryCacheLifetime: 1000 * 60, // 1m
+			fetcher: (key) => this.userProfilesRepository.findOneByOrFail({ userId: key }),
+			toRedisConverter: (value) => JSON.stringify(value),
+			fromRedisConverter: (value) => JSON.parse(value), // TODO: date型の考慮
+		});
+
+		this.userMutingsCache = new RedisKVCache<Set<string>>(this.redisClient, 'userMutings', {
+			lifetime: 1000 * 60 * 30, // 30m
+			memoryCacheLifetime: 1000 * 60, // 1m
+			fetcher: (key) => this.mutingsRepository.find({ where: { muterId: key }, select: ['muteeId'] }).then(xs => new Set(xs.map(x => x.muteeId))),
+			toRedisConverter: (value) => JSON.stringify(Array.from(value)),
+			fromRedisConverter: (value) => new Set(JSON.parse(value)),
+		});
+
+		this.userBlockingCache = new RedisKVCache<Set<string>>(this.redisClient, 'userBlocking', {
+			lifetime: 1000 * 60 * 30, // 30m
+			memoryCacheLifetime: 1000 * 60, // 1m
+			fetcher: (key) => this.blockingsRepository.find({ where: { blockerId: key }, select: ['blockeeId'] }).then(xs => new Set(xs.map(x => x.blockeeId))),
+			toRedisConverter: (value) => JSON.stringify(Array.from(value)),
+			fromRedisConverter: (value) => new Set(JSON.parse(value)),
+		});
+
+		this.userBlockedCache = new RedisKVCache<Set<string>>(this.redisClient, 'userBlocked', {
+			lifetime: 1000 * 60 * 30, // 30m
+			memoryCacheLifetime: 1000 * 60, // 1m
+			fetcher: (key) => this.blockingsRepository.find({ where: { blockeeId: key }, select: ['blockerId'] }).then(xs => new Set(xs.map(x => x.blockerId))),
+			toRedisConverter: (value) => JSON.stringify(Array.from(value)),
+			fromRedisConverter: (value) => new Set(JSON.parse(value)),
+		});
+
+		this.renoteMutingsCache = new RedisKVCache<Set<string>>(this.redisClient, 'renoteMutings', {
+			lifetime: 1000 * 60 * 30, // 30m
+			memoryCacheLifetime: 1000 * 60, // 1m
+			fetcher: (key) => this.renoteMutingsRepository.find({ where: { muterId: key }, select: ['muteeId'] }).then(xs => new Set(xs.map(x => x.muteeId))),
+			toRedisConverter: (value) => JSON.stringify(Array.from(value)),
+			fromRedisConverter: (value) => new Set(JSON.parse(value)),
+		});
+
+		this.userFollowingsCache = new RedisKVCache<Set<string>>(this.redisClient, 'userFollowings', {
+			lifetime: 1000 * 60 * 30, // 30m
+			memoryCacheLifetime: 1000 * 60, // 1m
+			fetcher: (key) => this.followingsRepository.find({ where: { followerId: key }, select: ['followeeId'] }).then(xs => new Set(xs.map(x => x.followeeId))),
+			toRedisConverter: (value) => JSON.stringify(Array.from(value)),
+			fromRedisConverter: (value) => new Set(JSON.parse(value)),
+		});
+
+		this.userFollowingChannelsCache = new RedisKVCache<Set<string>>(this.redisClient, 'userFollowingChannels', {
+			lifetime: 1000 * 60 * 30, // 30m
+			memoryCacheLifetime: 1000 * 60, // 1m
+			fetcher: (key) => this.channelFollowingsRepository.find({ where: { followerId: key }, select: ['followeeId'] }).then(xs => new Set(xs.map(x => x.followeeId))),
+			toRedisConverter: (value) => JSON.stringify(Array.from(value)),
+			fromRedisConverter: (value) => new Set(JSON.parse(value)),
+		});
 
 		this.redisSubscriber.on('message', this.onMessage);
 	}
diff --git a/packages/backend/src/core/DeleteAccountService.ts b/packages/backend/src/core/DeleteAccountService.ts
index 2acb5f2303..327283106f 100644
--- a/packages/backend/src/core/DeleteAccountService.ts
+++ b/packages/backend/src/core/DeleteAccountService.ts
@@ -36,8 +36,5 @@ export class DeleteAccountService {
 		await this.usersRepository.update(user.id, {
 			isDeleted: true,
 		});
-	
-		// Terminate streaming
-		this.globalEventService.publishUserEvent(user.id, 'terminate', {});
 	}
 }
diff --git a/packages/backend/src/core/GlobalEventService.ts b/packages/backend/src/core/GlobalEventService.ts
index d261a6c657..25c064a2b4 100644
--- a/packages/backend/src/core/GlobalEventService.ts
+++ b/packages/backend/src/core/GlobalEventService.ts
@@ -14,7 +14,6 @@ import type {
 	MainStreamTypes,
 	NoteStreamTypes,
 	UserListStreamTypes,
-	UserStreamTypes,
 } from '@/server/api/stream/types.js';
 import type { Packed } from '@/misc/json-schema.js';
 import { DI } from '@/di-symbols.js';
@@ -50,11 +49,6 @@ export class GlobalEventService {
 	}
 
 	@bindThis
-	public publishUserEvent<K extends keyof UserStreamTypes>(userId: User['id'], type: K, value?: UserStreamTypes[K]): void {
-		this.publish(`user:${userId}`, type, typeof value === 'undefined' ? null : value);
-	}
-
-	@bindThis
 	public publishBroadcastStream<K extends keyof BroadcastTypes>(type: K, value?: BroadcastTypes[K]): void {
 		this.publish('broadcast', type, typeof value === 'undefined' ? null : value);
 	}
diff --git a/packages/backend/src/core/NotificationService.ts b/packages/backend/src/core/NotificationService.ts
index 9c179f9318..366dc08c02 100644
--- a/packages/backend/src/core/NotificationService.ts
+++ b/packages/backend/src/core/NotificationService.ts
@@ -73,7 +73,7 @@ export class NotificationService implements OnApplicationShutdown {
 		type: Notification['type'],
 		data: Partial<Notification>,
 	): Promise<Notification | null> {
-		const profile = await this.cacheService.userProfileCache.fetch(notifieeId, () => this.userProfilesRepository.findOneByOrFail({ userId: notifieeId }));
+		const profile = await this.cacheService.userProfileCache.fetch(notifieeId);
 		const isMuted = profile.mutingNotificationTypes.includes(type);
 		if (isMuted) return null;
 
@@ -82,8 +82,8 @@ export class NotificationService implements OnApplicationShutdown {
 				return null;
 			}
 
-			const mutings = await this.cacheService.userMutingsCache.fetch(notifieeId, () => this.mutingsRepository.findBy({ muterId: notifieeId }).then(xs => xs.map(x => x.muteeId)));
-			if (mutings.includes(data.notifierId)) {
+			const mutings = await this.cacheService.userMutingsCache.fetch(notifieeId);
+			if (mutings.has(data.notifierId)) {
 				return null;
 			}
 		}
diff --git a/packages/backend/src/core/UserBlockingService.ts b/packages/backend/src/core/UserBlockingService.ts
index 040b6de2ef..6eaef8f68a 100644
--- a/packages/backend/src/core/UserBlockingService.ts
+++ b/packages/backend/src/core/UserBlockingService.ts
@@ -1,40 +1,26 @@
 
-import { Inject, Injectable, OnApplicationShutdown } from '@nestjs/common';
-import Redis from 'ioredis';
+import { Inject, Injectable } from '@nestjs/common';
 import { IdService } from '@/core/IdService.js';
 import type { User } from '@/models/entities/User.js';
 import type { Blocking } from '@/models/entities/Blocking.js';
 import { QueueService } from '@/core/QueueService.js';
 import { GlobalEventService } from '@/core/GlobalEventService.js';
-import PerUserFollowingChart from '@/core/chart/charts/per-user-following.js';
 import { DI } from '@/di-symbols.js';
-import type { UsersRepository, FollowingsRepository, FollowRequestsRepository, BlockingsRepository, UserListsRepository, UserListJoiningsRepository } from '@/models/index.js';
+import type { FollowRequestsRepository, BlockingsRepository, UserListsRepository, UserListJoiningsRepository } from '@/models/index.js';
 import Logger from '@/logger.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { ApRendererService } from '@/core/activitypub/ApRendererService.js';
 import { LoggerService } from '@/core/LoggerService.js';
 import { WebhookService } from '@/core/WebhookService.js';
 import { bindThis } from '@/decorators.js';
-import { MemoryKVCache } from '@/misc/cache.js';
-import { StreamMessages } from '@/server/api/stream/types.js';
+import { CacheService } from '@/core/CacheService.js';
+import { UserFollowingService } from '@/core/UserFollowingService.js';
 
 @Injectable()
-export class UserBlockingService implements OnApplicationShutdown {
+export class UserBlockingService {
 	private logger: Logger;
 
-	// キーがユーザーIDで、値がそのユーザーがブロックしているユーザーのIDのリストなキャッシュ
-	private blockingsByUserIdCache: MemoryKVCache<User['id'][]>;
-
 	constructor(
-		@Inject(DI.redisSubscriber)
-		private redisSubscriber: Redis.Redis,
-
-		@Inject(DI.usersRepository)
-		private usersRepository: UsersRepository,
-
-		@Inject(DI.followingsRepository)
-		private followingsRepository: FollowingsRepository,
-
 		@Inject(DI.followRequestsRepository)
 		private followRequestsRepository: FollowRequestsRepository,
 
@@ -47,47 +33,17 @@ export class UserBlockingService implements OnApplicationShutdown {
 		@Inject(DI.userListJoiningsRepository)
 		private userListJoiningsRepository: UserListJoiningsRepository,
 
+		private cacheService: CacheService,
+		private userFollowingService: UserFollowingService,
 		private userEntityService: UserEntityService,
 		private idService: IdService,
 		private queueService: QueueService,
 		private globalEventService: GlobalEventService,
 		private webhookService: WebhookService,
 		private apRendererService: ApRendererService,
-		private perUserFollowingChart: PerUserFollowingChart,
 		private loggerService: LoggerService,
 	) {
 		this.logger = this.loggerService.getLogger('user-block');
-
-		this.blockingsByUserIdCache = new MemoryKVCache<User['id'][]>(Infinity);
-
-		this.redisSubscriber.on('message', this.onMessage);
-	}
-
-	@bindThis
-	private async onMessage(_: string, data: string): Promise<void> {
-		const obj = JSON.parse(data);
-
-		if (obj.channel === 'internal') {
-			const { type, body } = obj.message as StreamMessages['internal']['payload'];
-			switch (type) {
-				case 'blockingCreated': {
-					const cached = this.blockingsByUserIdCache.get(body.blockerId);
-					if (cached) {
-						this.blockingsByUserIdCache.set(body.blockerId, [...cached, ...[body.blockeeId]]);
-					}
-					break;
-				}
-				case 'blockingDeleted': {
-					const cached = this.blockingsByUserIdCache.get(body.blockerId);
-					if (cached) {
-						this.blockingsByUserIdCache.set(body.blockerId, cached.filter(x => x !== body.blockeeId));
-					}
-					break;
-				}
-				default:
-					break;
-			}
-		}
 	}
 
 	@bindThis
@@ -95,8 +51,8 @@ export class UserBlockingService implements OnApplicationShutdown {
 		await Promise.all([
 			this.cancelRequest(blocker, blockee),
 			this.cancelRequest(blockee, blocker),
-			this.unFollow(blocker, blockee),
-			this.unFollow(blockee, blocker),
+			this.userFollowingService.unfollow(blocker, blockee),
+			this.userFollowingService.unfollow(blockee, blocker),
 			this.removeFromList(blockee, blocker),
 		]);
 
@@ -111,6 +67,9 @@ export class UserBlockingService implements OnApplicationShutdown {
 
 		await this.blockingsRepository.insert(blocking);
 
+		this.cacheService.userBlockingCache.refresh(blocker.id);
+		this.cacheService.userBlockedCache.refresh(blockee.id);
+
 		this.globalEventService.publishInternalEvent('blockingCreated', {
 			blockerId: blocker.id,
 			blockeeId: blockee.id,
@@ -148,7 +107,6 @@ export class UserBlockingService implements OnApplicationShutdown {
 			this.userEntityService.pack(followee, follower, {
 				detail: true,
 			}).then(async packed => {
-				this.globalEventService.publishUserEvent(follower.id, 'unfollow', packed);
 				this.globalEventService.publishMainStream(follower.id, 'unfollow', packed);
 
 				const webhooks = (await this.webhookService.getActiveWebhooks()).filter(x => x.userId === follower.id && x.on.includes('unfollow'));
@@ -174,54 +132,6 @@ export class UserBlockingService implements OnApplicationShutdown {
 	}
 
 	@bindThis
-	private async unFollow(follower: User, followee: User) {
-		const following = await this.followingsRepository.findOneBy({
-			followerId: follower.id,
-			followeeId: followee.id,
-		});
-
-		if (following == null) {
-			return;
-		}
-
-		await Promise.all([
-			this.followingsRepository.delete(following.id),
-			this.usersRepository.decrement({ id: follower.id }, 'followingCount', 1),
-			this.usersRepository.decrement({ id: followee.id }, 'followersCount', 1),
-			this.perUserFollowingChart.update(follower, followee, false),
-		]);
-
-		// Publish unfollow event
-		if (this.userEntityService.isLocalUser(follower)) {
-			this.userEntityService.pack(followee, follower, {
-				detail: true,
-			}).then(async packed => {
-				this.globalEventService.publishUserEvent(follower.id, 'unfollow', packed);
-				this.globalEventService.publishMainStream(follower.id, 'unfollow', packed);
-
-				const webhooks = (await this.webhookService.getActiveWebhooks()).filter(x => x.userId === follower.id && x.on.includes('unfollow'));
-				for (const webhook of webhooks) {
-					this.queueService.webhookDeliver(webhook, 'unfollow', {
-						user: packed,
-					});
-				}
-			});
-		}
-
-		// リモートにフォローをしていたらUndoFollow送信
-		if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
-			const content = this.apRendererService.addContext(this.apRendererService.renderUndo(this.apRendererService.renderFollow(follower, followee), follower));
-			this.queueService.deliver(follower, content, followee.inbox, false);
-		}
-
-		// リモートからフォローをされていたらRejectFollow送信
-		if (this.userEntityService.isLocalUser(followee) && this.userEntityService.isRemoteUser(follower)) {
-			const content = this.apRendererService.addContext(this.apRendererService.renderReject(this.apRendererService.renderFollow(follower, followee), followee));
-			this.queueService.deliver(followee, content, follower.inbox, false);
-		}
-	}
-
-	@bindThis
 	private async removeFromList(listOwner: User, user: User) {
 		const userLists = await this.userListsRepository.findBy({
 			userId: listOwner.id,
@@ -254,6 +164,9 @@ export class UserBlockingService implements OnApplicationShutdown {
 
 		await this.blockingsRepository.delete(blocking.id);
 
+		this.cacheService.userBlockingCache.refresh(blocker.id);
+		this.cacheService.userBlockedCache.refresh(blockee.id);
+
 		this.globalEventService.publishInternalEvent('blockingDeleted', {
 			blockerId: blocker.id,
 			blockeeId: blockee.id,
@@ -268,17 +181,6 @@ export class UserBlockingService implements OnApplicationShutdown {
 
 	@bindThis
 	public async checkBlocked(blockerId: User['id'], blockeeId: User['id']): Promise<boolean> {
-		const blockedUserIds = await this.blockingsByUserIdCache.fetch(blockerId, () => this.blockingsRepository.find({
-			where: {
-				blockerId,
-			},
-			select: ['blockeeId'],
-		}).then(records => records.map(record => record.blockeeId)));
-		return blockedUserIds.includes(blockeeId);
-	}
-
-	@bindThis
-	public onApplicationShutdown(signal?: string | undefined) {
-		this.redisSubscriber.off('message', this.onMessage);
+		return (await this.cacheService.userBlockingCache.fetch(blockerId)).has(blockeeId);
 	}
 }
diff --git a/packages/backend/src/core/UserFollowingService.ts b/packages/backend/src/core/UserFollowingService.ts
index b51b553c70..4f22c5cd46 100644
--- a/packages/backend/src/core/UserFollowingService.ts
+++ b/packages/backend/src/core/UserFollowingService.ts
@@ -18,6 +18,7 @@ import { ApRendererService } from '@/core/activitypub/ApRendererService.js';
 import { bindThis } from '@/decorators.js';
 import { UserBlockingService } from '@/core/UserBlockingService.js';
 import { MetaService } from '@/core/MetaService.js';
+import { CacheService } from '@/core/CacheService.js';
 import Logger from '../logger.js';
 
 const logger = new Logger('following/create');
@@ -53,6 +54,7 @@ export class UserFollowingService {
 		@Inject(DI.instancesRepository)
 		private instancesRepository: InstancesRepository,
 
+		private cacheService: CacheService,
 		private userEntityService: UserEntityService,
 		private userBlockingService: UserBlockingService,
 		private idService: IdService,
@@ -172,6 +174,8 @@ export class UserFollowingService {
 			}
 		});
 
+		this.cacheService.userFollowingsCache.refresh(follower.id);
+
 		const req = await this.followRequestsRepository.findOneBy({
 			followeeId: followee.id,
 			followerId: follower.id,
@@ -225,7 +229,6 @@ export class UserFollowingService {
 			this.userEntityService.pack(followee.id, follower, {
 				detail: true,
 			}).then(async packed => {
-				this.globalEventService.publishUserEvent(follower.id, 'follow', packed as Packed<'UserDetailedNotMe'>);
 				this.globalEventService.publishMainStream(follower.id, 'follow', packed as Packed<'UserDetailedNotMe'>);
 
 				const webhooks = (await this.webhookService.getActiveWebhooks()).filter(x => x.userId === follower.id && x.on.includes('follow'));
@@ -279,6 +282,8 @@ export class UserFollowingService {
 
 		await this.followingsRepository.delete(following.id);
 
+		this.cacheService.userFollowingsCache.refresh(follower.id);
+
 		this.decrementFollowing(follower, followee);
 
 		// Publish unfollow event
@@ -286,7 +291,6 @@ export class UserFollowingService {
 			this.userEntityService.pack(followee.id, follower, {
 				detail: true,
 			}).then(async packed => {
-				this.globalEventService.publishUserEvent(follower.id, 'unfollow', packed);
 				this.globalEventService.publishMainStream(follower.id, 'unfollow', packed);
 
 				const webhooks = (await this.webhookService.getActiveWebhooks()).filter(x => x.userId === follower.id && x.on.includes('unfollow'));
@@ -579,7 +583,6 @@ export class UserFollowingService {
 			detail: true,
 		});
 
-		this.globalEventService.publishUserEvent(follower.id, 'unfollow', packedFollowee);
 		this.globalEventService.publishMainStream(follower.id, 'unfollow', packedFollowee);
 
 		const webhooks = (await this.webhookService.getActiveWebhooks()).filter(x => x.userId === follower.id && x.on.includes('unfollow'));
diff --git a/packages/backend/src/core/UserMutingService.ts b/packages/backend/src/core/UserMutingService.ts
index e98f11709f..657b5764b9 100644
--- a/packages/backend/src/core/UserMutingService.ts
+++ b/packages/backend/src/core/UserMutingService.ts
@@ -1,34 +1,47 @@
 import { Inject, Injectable } from '@nestjs/common';
-import type { UsersRepository, MutingsRepository } from '@/models/index.js';
+import { In } from 'typeorm';
+import type { MutingsRepository, Muting } from '@/models/index.js';
 import { IdService } from '@/core/IdService.js';
-import { QueueService } from '@/core/QueueService.js';
-import { GlobalEventService } from '@/core/GlobalEventService.js';
 import type { User } from '@/models/entities/User.js';
 import { DI } from '@/di-symbols.js';
 import { bindThis } from '@/decorators.js';
+import { CacheService } from '@/core/CacheService';
 
 @Injectable()
 export class UserMutingService {
 	constructor(
-		@Inject(DI.usersRepository)
-		private usersRepository: UsersRepository,
-
 		@Inject(DI.mutingsRepository)
 		private mutingsRepository: MutingsRepository,
 
 		private idService: IdService,
-		private queueService: QueueService,
-		private globalEventService: GlobalEventService,
+		private cacheService: CacheService,
 	) {
 	}
 
 	@bindThis
-	public async mute(user: User, target: User): Promise<void> {
+	public async mute(user: User, target: User, expiresAt: Date | null = null): Promise<void> {
 		await this.mutingsRepository.insert({
 			id: this.idService.genId(),
 			createdAt: new Date(),
+			expiresAt: expiresAt ?? null,
 			muterId: user.id,
 			muteeId: target.id,
 		});
+
+		this.cacheService.userMutingsCache.refresh(user.id);
+	}
+
+	@bindThis
+	public async unmute(mutings: Muting[]): Promise<void> {
+		if (mutings.length === 0) return;
+
+		await this.mutingsRepository.delete({
+			id: In(mutings.map(m => m.id)),
+		});
+
+		const muterIds = [...new Set(mutings.map(m => m.muterId))];
+		for (const muterId of muterIds) {
+			this.cacheService.userMutingsCache.refresh(muterId);
+		}
 	}
 }
diff --git a/packages/backend/src/misc/cache.ts b/packages/backend/src/misc/cache.ts
index 870dfd237c..ef6f610125 100644
--- a/packages/backend/src/misc/cache.ts
+++ b/packages/backend/src/misc/cache.ts
@@ -1,29 +1,29 @@
 import Redis from 'ioredis';
 import { bindThis } from '@/decorators.js';
 
-// redis通すとDateのインスタンスはstringに変換されるので
-type Serialized<T> = {
-	[K in keyof T]:
-		T[K] extends Date
-			? string
-			: T[K] extends (Date | null)
-				? (string | null)
-				: T[K] extends Record<string, any>
-					? Serialized<T[K]>
-					: T[K];
-};
-
 export class RedisKVCache<T> {
 	private redisClient: Redis.Redis;
 	private name: string;
 	private lifetime: number;
 	private memoryCache: MemoryKVCache<T>;
+	private fetcher: (key: string) => Promise<T>;
+	private toRedisConverter: (value: T) => string;
+	private fromRedisConverter: (value: string) => T;
 
-	constructor(redisClient: RedisKVCache<never>['redisClient'], name: RedisKVCache<never>['name'], lifetime: RedisKVCache<never>['lifetime'], memoryCacheLifetime: number) {
+	constructor(redisClient: RedisKVCache<T>['redisClient'], name: RedisKVCache<T>['name'], opts: {
+		lifetime: RedisKVCache<T>['lifetime'];
+		memoryCacheLifetime: number;
+		fetcher: RedisKVCache<T>['fetcher'];
+		toRedisConverter: RedisKVCache<T>['toRedisConverter'];
+		fromRedisConverter: RedisKVCache<T>['fromRedisConverter'];
+	}) {
 		this.redisClient = redisClient;
 		this.name = name;
-		this.lifetime = lifetime;
-		this.memoryCache = new MemoryKVCache(memoryCacheLifetime);
+		this.lifetime = opts.lifetime;
+		this.memoryCache = new MemoryKVCache(opts.memoryCacheLifetime);
+		this.fetcher = opts.fetcher;
+		this.toRedisConverter = opts.toRedisConverter;
+		this.fromRedisConverter = opts.fromRedisConverter;
 	}
 
 	@bindThis
@@ -32,25 +32,25 @@ export class RedisKVCache<T> {
 		if (this.lifetime === Infinity) {
 			await this.redisClient.set(
 				`kvcache:${this.name}:${key}`,
-				JSON.stringify(value),
+				this.toRedisConverter(value),
 			);
 		} else {
 			await this.redisClient.set(
 				`kvcache:${this.name}:${key}`,
-				JSON.stringify(value),
+				this.toRedisConverter(value),
 				'ex', Math.round(this.lifetime / 1000),
 			);
 		}
 	}
 
 	@bindThis
-	public async get(key: string): Promise<Serialized<T> | T | undefined> {
+	public async get(key: string): Promise<T | undefined> {
 		const memoryCached = this.memoryCache.get(key);
 		if (memoryCached !== undefined) return memoryCached;
 
 		const cached = await this.redisClient.get(`kvcache:${this.name}:${key}`);
 		if (cached == null) return undefined;
-		return JSON.parse(cached);
+		return this.fromRedisConverter(cached);
 	}
 
 	@bindThis
@@ -60,29 +60,29 @@ export class RedisKVCache<T> {
 	}
 
 	/**
- * キャッシュがあればそれを返し、無ければfetcherを呼び出して結果をキャッシュ&返します
- * optional: キャッシュが存在してもvalidatorでfalseを返すとキャッシュ無効扱いにします
- */
+	 * キャッシュがあればそれを返し、無ければfetcherを呼び出して結果をキャッシュ&返します
+	 */
 	@bindThis
-	public async fetch(key: string, fetcher: () => Promise<T>, validator?: (cachedValue: Serialized<T> | T) => boolean): Promise<Serialized<T> | T> {
+	public async fetch(key: string): Promise<T> {
 		const cachedValue = await this.get(key);
 		if (cachedValue !== undefined) {
-			if (validator) {
-				if (validator(cachedValue)) {
-					// Cache HIT
-					return cachedValue;
-				}
-			} else {
-				// Cache HIT
-				return cachedValue;
-			}
+			// Cache HIT
+			return cachedValue;
 		}
 
 		// Cache MISS
-		const value = await fetcher();
+		const value = await this.fetcher(key);
 		this.set(key, value);
 		return value;
 	}
+
+	@bindThis
+	public async refresh(key: string) {
+		const value = await this.fetcher(key);
+		this.set(key, value);
+
+		// TODO: イベント発行して他プロセスのメモリキャッシュも更新できるようにする
+	}
 }
 
 // TODO: メモリ節約のためあまり参照されないキーを定期的に削除できるようにする？
diff --git a/packages/backend/src/queue/processors/CheckExpiredMutingsProcessorService.ts b/packages/backend/src/queue/processors/CheckExpiredMutingsProcessorService.ts
index f4cd560fc9..2476d71a5e 100644
--- a/packages/backend/src/queue/processors/CheckExpiredMutingsProcessorService.ts
+++ b/packages/backend/src/queue/processors/CheckExpiredMutingsProcessorService.ts
@@ -4,10 +4,10 @@ import { DI } from '@/di-symbols.js';
 import type { MutingsRepository } from '@/models/index.js';
 import type { Config } from '@/config.js';
 import type Logger from '@/logger.js';
-import { GlobalEventService } from '@/core/GlobalEventService.js';
+import { bindThis } from '@/decorators.js';
+import { UserMutingService } from '@/core/UserMutingService.js';
 import { QueueLoggerService } from '../QueueLoggerService.js';
 import type Bull from 'bull';
-import { bindThis } from '@/decorators.js';
 
 @Injectable()
 export class CheckExpiredMutingsProcessorService {
@@ -20,7 +20,7 @@ export class CheckExpiredMutingsProcessorService {
 		@Inject(DI.mutingsRepository)
 		private mutingsRepository: MutingsRepository,
 
-		private globalEventService: GlobalEventService,
+		private userMutingService: UserMutingService,
 		private queueLoggerService: QueueLoggerService,
 	) {
 		this.logger = this.queueLoggerService.logger.createSubLogger('check-expired-mutings');
@@ -37,13 +37,7 @@ export class CheckExpiredMutingsProcessorService {
 			.getMany();
 
 		if (expired.length > 0) {
-			await this.mutingsRepository.delete({
-				id: In(expired.map(m => m.id)),
-			});
-
-			for (const m of expired) {
-				this.globalEventService.publishUserEvent(m.muterId, 'unmute', m.mutee!);
-			}
+			await this.userMutingService.unmute(expired);
 		}
 
 		this.logger.succ('All expired mutings checked.');
diff --git a/packages/backend/src/server/api/StreamingApiServerService.ts b/packages/backend/src/server/api/StreamingApiServerService.ts
index 13526f277d..bd2d436a23 100644
--- a/packages/backend/src/server/api/StreamingApiServerService.ts
+++ b/packages/backend/src/server/api/StreamingApiServerService.ts
@@ -9,6 +9,7 @@ import { NoteReadService } from '@/core/NoteReadService.js';
 import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { NotificationService } from '@/core/NotificationService.js';
 import { bindThis } from '@/decorators.js';
+import { CacheService } from '@/core/CacheService.js';
 import { AuthenticateService } from './AuthenticateService.js';
 import MainStreamConnection from './stream/index.js';
 import { ChannelsService } from './stream/ChannelsService.js';
@@ -45,7 +46,7 @@ export class StreamingApiServerService {
 		@Inject(DI.userProfilesRepository)
 		private userProfilesRepository: UserProfilesRepository,
 	
-		private globalEventService: GlobalEventService,
+		private cacheService: CacheService,
 		private noteReadService: NoteReadService,
 		private authenticateService: AuthenticateService,
 		private channelsService: ChannelsService,
@@ -73,8 +74,6 @@ export class StreamingApiServerService {
 				return;
 			}
 
-			const connection = request.accept();
-
 			const ev = new EventEmitter();
 
 			async function onRedisMessage(_: string, data: string): Promise<void> {
@@ -85,19 +84,19 @@ export class StreamingApiServerService {
 			this.redisSubscriber.on('message', onRedisMessage);
 
 			const main = new MainStreamConnection(
-				this.followingsRepository,
-				this.mutingsRepository,
-				this.renoteMutingsRepository,
-				this.blockingsRepository,
-				this.channelFollowingsRepository,
-				this.userProfilesRepository,
 				this.channelsService,
-				this.globalEventService,
 				this.noteReadService,
 				this.notificationService,
-				connection, ev, user, miapp,
+				this.cacheService,
+				ev, user, miapp,
 			);
 
+			await main.init();
+
+			const connection = request.accept();
+
+			main.init2(connection);
+
 			const intervalId = user ? setInterval(() => {
 				this.usersRepository.update(user.id, {
 					lastActiveDate: new Date(),
diff --git a/packages/backend/src/server/api/endpoints/admin/accounts/delete.ts b/packages/backend/src/server/api/endpoints/admin/accounts/delete.ts
index e9f72676f0..16232813a8 100644
--- a/packages/backend/src/server/api/endpoints/admin/accounts/delete.ts
+++ b/packages/backend/src/server/api/endpoints/admin/accounts/delete.ts
@@ -61,11 +61,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			await this.usersRepository.update(user.id, {
 				isDeleted: true,
 			});
-
-			if (this.userEntityService.isLocalUser(user)) {
-				// Terminate streaming
-				this.globalEventService.publishUserEvent(user.id, 'terminate', {});
-			}
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/endpoints/admin/suspend-user.ts b/packages/backend/src/server/api/endpoints/admin/suspend-user.ts
index 770b61850a..3c99225272 100644
--- a/packages/backend/src/server/api/endpoints/admin/suspend-user.ts
+++ b/packages/backend/src/server/api/endpoints/admin/suspend-user.ts
@@ -62,11 +62,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				targetId: user.id,
 			});
 
-			// Terminate streaming
-			if (this.userEntityService.isLocalUser(user)) {
-				this.globalEventService.publishUserEvent(user.id, 'terminate', {});
-			}
-
 			(async () => {
 				await this.userSuspendService.doPostSuspend(user).catch(e => {});
 				await this.unFollowAll(user).catch(e => {});
diff --git a/packages/backend/src/server/api/endpoints/channels/follow.ts b/packages/backend/src/server/api/endpoints/channels/follow.ts
index 91693918f2..8ab59991c7 100644
--- a/packages/backend/src/server/api/endpoints/channels/follow.ts
+++ b/packages/backend/src/server/api/endpoints/channels/follow.ts
@@ -41,7 +41,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private channelFollowingsRepository: ChannelFollowingsRepository,
 
 		private idService: IdService,
-		private globalEventService: GlobalEventService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const channel = await this.channelsRepository.findOneBy({
@@ -58,8 +57,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				followerId: me.id,
 				followeeId: channel.id,
 			});
-
-			this.globalEventService.publishUserEvent(me.id, 'followChannel', channel);
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/endpoints/channels/unfollow.ts b/packages/backend/src/server/api/endpoints/channels/unfollow.ts
index ac2ef825be..855ba47f8c 100644
--- a/packages/backend/src/server/api/endpoints/channels/unfollow.ts
+++ b/packages/backend/src/server/api/endpoints/channels/unfollow.ts
@@ -38,8 +38,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 		@Inject(DI.channelFollowingsRepository)
 		private channelFollowingsRepository: ChannelFollowingsRepository,
-
-		private globalEventService: GlobalEventService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const channel = await this.channelsRepository.findOneBy({
@@ -54,8 +52,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				followerId: me.id,
 				followeeId: channel.id,
 			});
-
-			this.globalEventService.publishUserEvent(me.id, 'unfollowChannel', channel);
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/endpoints/i/regenerate-token.ts b/packages/backend/src/server/api/endpoints/i/regenerate-token.ts
index 786e64374c..23ff63f5e9 100644
--- a/packages/backend/src/server/api/endpoints/i/regenerate-token.ts
+++ b/packages/backend/src/server/api/endpoints/i/regenerate-token.ts
@@ -54,11 +54,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			// Publish event
 			this.globalEventService.publishInternalEvent('userTokenRegenerated', { id: me.id, oldToken, newToken });
 			this.globalEventService.publishMainStream(me.id, 'myTokenRegenerated');
-
-			// Terminate streaming
-			setTimeout(() => {
-				this.globalEventService.publishUserEvent(me.id, 'terminate', {});
-			}, 5000);
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/endpoints/i/revoke-token.ts b/packages/backend/src/server/api/endpoints/i/revoke-token.ts
index 5e1dddb6b7..93daeb0cd7 100644
--- a/packages/backend/src/server/api/endpoints/i/revoke-token.ts
+++ b/packages/backend/src/server/api/endpoints/i/revoke-token.ts
@@ -35,9 +35,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 					id: ps.tokenId,
 					userId: me.id,
 				});
-
-				// Terminate streaming
-				this.globalEventService.publishUserEvent(me.id, 'terminate');
 			}
 		});
 	}
diff --git a/packages/backend/src/server/api/endpoints/i/update.ts b/packages/backend/src/server/api/endpoints/i/update.ts
index 46b16e9dce..c20f2b7913 100644
--- a/packages/backend/src/server/api/endpoints/i/update.ts
+++ b/packages/backend/src/server/api/endpoints/i/update.ts
@@ -284,7 +284,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 			// Publish meUpdated event
 			this.globalEventService.publishMainStream(user.id, 'meUpdated', iObj);
-			this.globalEventService.publishUserEvent(user.id, 'updateUserProfile', updatedProfile);
 
 			// 鍵垢を解除したとき、溜まっていたフォローリクエストがあるならすべて承認
 			if (user.isLocked && ps.isLocked === false) {
diff --git a/packages/backend/src/server/api/endpoints/mute/create.ts b/packages/backend/src/server/api/endpoints/mute/create.ts
index fd062e1cab..6e24e1024d 100644
--- a/packages/backend/src/server/api/endpoints/mute/create.ts
+++ b/packages/backend/src/server/api/endpoints/mute/create.ts
@@ -1,13 +1,10 @@
 import { Inject, Injectable } from '@nestjs/common';
 import ms from 'ms';
 import { Endpoint } from '@/server/api/endpoint-base.js';
-import { IdService } from '@/core/IdService.js';
 import type { MutingsRepository } from '@/models/index.js';
-import type { Muting } from '@/models/entities/Muting.js';
-import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { DI } from '@/di-symbols.js';
 import { GetterService } from '@/server/api/GetterService.js';
-import { CacheService } from '@/core/CacheService.js';
+import { UserMutingService } from '@/core/UserMutingService.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -63,10 +60,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		@Inject(DI.mutingsRepository)
 		private mutingsRepository: MutingsRepository,
 
-		private globalEventService: GlobalEventService,
 		private getterService: GetterService,
-		private idService: IdService,
-		private cacheService: CacheService,
+		private userMutingService: UserMutingService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const muter = me;
@@ -96,17 +91,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				return;
 			}
 
-			// Create mute
-			await this.mutingsRepository.insert({
-				id: this.idService.genId(),
-				createdAt: new Date(),
-				expiresAt: ps.expiresAt ? new Date(ps.expiresAt) : null,
-				muterId: muter.id,
-				muteeId: mutee.id,
-			} as Muting);
-
-			this.cacheService.userMutingsCache.delete(muter.id);
-			this.globalEventService.publishUserEvent(me.id, 'mute', mutee);
+			await this.userMutingService.mute(muter, mutee, ps.expiresAt ? new Date(ps.expiresAt) : null);
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/endpoints/mute/delete.ts b/packages/backend/src/server/api/endpoints/mute/delete.ts
index 612c4a4c04..90b74590be 100644
--- a/packages/backend/src/server/api/endpoints/mute/delete.ts
+++ b/packages/backend/src/server/api/endpoints/mute/delete.ts
@@ -1,10 +1,10 @@
 import { Inject, Injectable } from '@nestjs/common';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import type { MutingsRepository } from '@/models/index.js';
-import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { DI } from '@/di-symbols.js';
-import { ApiError } from '../../error.js';
 import { GetterService } from '@/server/api/GetterService.js';
+import { UserMutingService } from '@/core/UserMutingService.js';
+import { ApiError } from '../../error.js';
 
 export const meta = {
 	tags: ['account'],
@@ -49,7 +49,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		@Inject(DI.mutingsRepository)
 		private mutingsRepository: MutingsRepository,
 
-		private globalEventService: GlobalEventService,
+		private userMutingService: UserMutingService,
 		private getterService: GetterService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
@@ -76,12 +76,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				throw new ApiError(meta.errors.notMuting);
 			}
 
-			// Delete mute
-			await this.mutingsRepository.delete({
-				id: exist.id,
-			});
-
-			this.globalEventService.publishUserEvent(me.id, 'unmute', mutee);
+			await this.userMutingService.unmute([exist]);
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/endpoints/renote-mute/delete.ts b/packages/backend/src/server/api/endpoints/renote-mute/delete.ts
index 51a895fb7e..70901a1406 100644
--- a/packages/backend/src/server/api/endpoints/renote-mute/delete.ts
+++ b/packages/backend/src/server/api/endpoints/renote-mute/delete.ts
@@ -80,8 +80,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			await this.renoteMutingsRepository.delete({
 				id: exist.id,
 			});
-
-			// publishUserEvent(user.id, 'unmute', mutee);
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/stream/channel.ts b/packages/backend/src/server/api/stream/channel.ts
index 32935325aa..e67aec9ecd 100644
--- a/packages/backend/src/server/api/stream/channel.ts
+++ b/packages/backend/src/server/api/stream/channel.ts
@@ -23,16 +23,16 @@ export default abstract class Channel {
 		return this.connection.following;
 	}
 
-	protected get muting() {
-		return this.connection.muting;
+	protected get userIdsWhoMeMuting() {
+		return this.connection.userIdsWhoMeMuting;
 	}
 
-	protected get renoteMuting() {
-		return this.connection.renoteMuting;
+	protected get userIdsWhoMeMutingRenotes() {
+		return this.connection.userIdsWhoMeMutingRenotes;
 	}
 
-	protected get blocking() {
-		return this.connection.blocking;
+	protected get userIdsWhoBlockingMe() {
+		return this.connection.userIdsWhoBlockingMe;
 	}
 
 	protected get followingChannels() {
diff --git a/packages/backend/src/server/api/stream/channels/antenna.ts b/packages/backend/src/server/api/stream/channels/antenna.ts
index e2a42fbfe9..d48dea7258 100644
--- a/packages/backend/src/server/api/stream/channels/antenna.ts
+++ b/packages/backend/src/server/api/stream/channels/antenna.ts
@@ -35,11 +35,11 @@ class AntennaChannel extends Channel {
 			const note = await this.noteEntityService.pack(data.body.id, this.user, { detail: true });
 
 			// 流れてきたNoteがミュートしているユーザーが関わるものだったら無視する
-			if (isUserRelated(note, this.muting)) return;
+			if (isUserRelated(note, this.userIdsWhoMeMuting)) return;
 			// 流れてきたNoteがブロックされているユーザーが関わるものだったら無視する
-			if (isUserRelated(note, this.blocking)) return;
+			if (isUserRelated(note, this.userIdsWhoBlockingMe)) return;
 
-			if (note.renote && !note.text && isUserRelated(note, this.renoteMuting)) return;
+			if (note.renote && !note.text && isUserRelated(note, this.userIdsWhoMeMutingRenotes)) return;
 
 			this.connection.cacheNote(note);
 
diff --git a/packages/backend/src/server/api/stream/channels/channel.ts b/packages/backend/src/server/api/stream/channels/channel.ts
index 12caa7f233..9e5b40997b 100644
--- a/packages/backend/src/server/api/stream/channels/channel.ts
+++ b/packages/backend/src/server/api/stream/channels/channel.ts
@@ -47,11 +47,11 @@ class ChannelChannel extends Channel {
 		}
 
 		// 流れてきたNoteがミュートしているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.muting)) return;
+		if (isUserRelated(note, this.userIdsWhoMeMuting)) return;
 		// 流れてきたNoteがブロックされているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.blocking)) return;
+		if (isUserRelated(note, this.userIdsWhoBlockingMe)) return;
 
-		if (note.renote && !note.text && isUserRelated(note, this.renoteMuting)) return;
+		if (note.renote && !note.text && isUserRelated(note, this.userIdsWhoMeMutingRenotes)) return;
 
 		this.connection.cacheNote(note);
 
diff --git a/packages/backend/src/server/api/stream/channels/global-timeline.ts b/packages/backend/src/server/api/stream/channels/global-timeline.ts
index d79247cd6e..5454836fe1 100644
--- a/packages/backend/src/server/api/stream/channels/global-timeline.ts
+++ b/packages/backend/src/server/api/stream/channels/global-timeline.ts
@@ -64,11 +64,11 @@ class GlobalTimelineChannel extends Channel {
 		if (isInstanceMuted(note, new Set<string>(this.userProfile?.mutedInstances ?? []))) return;
 
 		// 流れてきたNoteがミュートしているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.muting)) return;
+		if (isUserRelated(note, this.userIdsWhoMeMuting)) return;
 		// 流れてきたNoteがブロックされているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.blocking)) return;
+		if (isUserRelated(note, this.userIdsWhoBlockingMe)) return;
 
-		if (note.renote && !note.text && isUserRelated(note, this.renoteMuting)) return;
+		if (note.renote && !note.text && isUserRelated(note, this.userIdsWhoMeMutingRenotes)) return;
 
 		// 流れてきたNoteがミュートすべきNoteだったら無視する
 		// TODO: 将来的には、単にMutedNoteテーブルにレコードがあるかどうかで判定したい(以下の理由により難しそうではある)
diff --git a/packages/backend/src/server/api/stream/channels/hashtag.ts b/packages/backend/src/server/api/stream/channels/hashtag.ts
index 98dc858ded..0268fdedde 100644
--- a/packages/backend/src/server/api/stream/channels/hashtag.ts
+++ b/packages/backend/src/server/api/stream/channels/hashtag.ts
@@ -46,11 +46,11 @@ class HashtagChannel extends Channel {
 		}
 
 		// 流れてきたNoteがミュートしているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.muting)) return;
+		if (isUserRelated(note, this.userIdsWhoMeMuting)) return;
 		// 流れてきたNoteがブロックされているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.blocking)) return;
+		if (isUserRelated(note, this.userIdsWhoBlockingMe)) return;
 		
-		if (note.renote && !note.text && isUserRelated(note, this.renoteMuting)) return;
+		if (note.renote && !note.text && isUserRelated(note, this.userIdsWhoMeMutingRenotes)) return;
 
 		this.connection.cacheNote(note);
 
diff --git a/packages/backend/src/server/api/stream/channels/home-timeline.ts b/packages/backend/src/server/api/stream/channels/home-timeline.ts
index c623fef64a..ee874ad81e 100644
--- a/packages/backend/src/server/api/stream/channels/home-timeline.ts
+++ b/packages/backend/src/server/api/stream/channels/home-timeline.ts
@@ -24,7 +24,6 @@ class HomeTimelineChannel extends Channel {
 
 	@bindThis
 	public async init(params: any) {
-		// Subscribe events
 		this.subscriber.on('notesStream', this.onNote);
 	}
 
@@ -38,7 +37,7 @@ class HomeTimelineChannel extends Channel {
 		}
 
 		// Ignore notes from instances the user has muted
-		if (isInstanceMuted(note, new Set<string>(this.userProfile?.mutedInstances ?? []))) return;
+		if (isInstanceMuted(note, new Set<string>(this.userProfile!.mutedInstances ?? []))) return;
 
 		if (['followers', 'specified'].includes(note.visibility)) {
 			note = await this.noteEntityService.pack(note.id, this.user!, {
@@ -71,18 +70,18 @@ class HomeTimelineChannel extends Channel {
 		}
 
 		// 流れてきたNoteがミュートしているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.muting)) return;
+		if (isUserRelated(note, this.userIdsWhoMeMuting)) return;
 		// 流れてきたNoteがブロックされているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.blocking)) return;
+		if (isUserRelated(note, this.userIdsWhoBlockingMe)) return;
 
-		if (note.renote && !note.text && isUserRelated(note, this.renoteMuting)) return;
+		if (note.renote && !note.text && isUserRelated(note, this.userIdsWhoMeMutingRenotes)) return;
 
 		// 流れてきたNoteがミュートすべきNoteだったら無視する
 		// TODO: 将来的には、単にMutedNoteテーブルにレコードがあるかどうかで判定したい(以下の理由により難しそうではある)
 		// 現状では、ワードミュートにおけるMutedNoteレコードの追加処理はストリーミングに流す処理と並列で行われるため、
 		// レコードが追加されるNoteでも追加されるより先にここのストリーミングの処理に到達することが起こる。
 		// そのためレコードが存在するかのチェックでは不十分なので、改めてcheckWordMuteを呼んでいる
-		if (this.userProfile && await checkWordMute(note, this.user, this.userProfile.mutedWords)) return;
+		if (await checkWordMute(note, this.user, this.userProfile!.mutedWords)) return;
 
 		this.connection.cacheNote(note);
 
diff --git a/packages/backend/src/server/api/stream/channels/hybrid-timeline.ts b/packages/backend/src/server/api/stream/channels/hybrid-timeline.ts
index f54767bc9d..4f7b4e78b6 100644
--- a/packages/backend/src/server/api/stream/channels/hybrid-timeline.ts
+++ b/packages/backend/src/server/api/stream/channels/hybrid-timeline.ts
@@ -72,7 +72,7 @@ class HybridTimelineChannel extends Channel {
 		}
 
 		// Ignore notes from instances the user has muted
-		if (isInstanceMuted(note, new Set<string>(this.userProfile?.mutedInstances ?? []))) return;
+		if (isInstanceMuted(note, new Set<string>(this.userProfile!.mutedInstances ?? []))) return;
 
 		// 関係ない返信は除外
 		if (note.reply && !this.user!.showTimelineReplies) {
@@ -82,11 +82,11 @@ class HybridTimelineChannel extends Channel {
 		}
 
 		// 流れてきたNoteがミュートしているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.muting)) return;
+		if (isUserRelated(note, this.userIdsWhoMeMuting)) return;
 		// 流れてきたNoteがブロックされているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.blocking)) return;
+		if (isUserRelated(note, this.userIdsWhoBlockingMe)) return;
 
-		if (note.renote && !note.text && isUserRelated(note, this.renoteMuting)) return;
+		if (note.renote && !note.text && isUserRelated(note, this.userIdsWhoMeMutingRenotes)) return;
 
 		// 流れてきたNoteがミュートすべきNoteだったら無視する
 		// TODO: 将来的には、単にMutedNoteテーブルにレコードがあるかどうかで判定したい(以下の理由により難しそうではある)
diff --git a/packages/backend/src/server/api/stream/channels/local-timeline.ts b/packages/backend/src/server/api/stream/channels/local-timeline.ts
index eb0642900d..836c5aae6c 100644
--- a/packages/backend/src/server/api/stream/channels/local-timeline.ts
+++ b/packages/backend/src/server/api/stream/channels/local-timeline.ts
@@ -61,11 +61,11 @@ class LocalTimelineChannel extends Channel {
 		}
 
 		// 流れてきたNoteがミュートしているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.muting)) return;
+		if (isUserRelated(note, this.userIdsWhoMeMuting)) return;
 		// 流れてきたNoteがブロックされているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.blocking)) return;
+		if (isUserRelated(note, this.userIdsWhoBlockingMe)) return;
 
-		if (note.renote && !note.text && isUserRelated(note, this.renoteMuting)) return;
+		if (note.renote && !note.text && isUserRelated(note, this.userIdsWhoMeMutingRenotes)) return;
 
 		// 流れてきたNoteがミュートすべきNoteだったら無視する
 		// TODO: 将来的には、単にMutedNoteテーブルにレコードがあるかどうかで判定したい(以下の理由により難しそうではある)
diff --git a/packages/backend/src/server/api/stream/channels/main.ts b/packages/backend/src/server/api/stream/channels/main.ts
index 4dd16b530a..139320ce35 100644
--- a/packages/backend/src/server/api/stream/channels/main.ts
+++ b/packages/backend/src/server/api/stream/channels/main.ts
@@ -26,7 +26,7 @@ class MainChannel extends Channel {
 				case 'notification': {
 					// Ignore notifications from instances the user has muted
 					if (isUserFromMutedInstance(data.body, new Set<string>(this.userProfile?.mutedInstances ?? []))) return;
-					if (data.body.userId && this.muting.has(data.body.userId)) return;
+					if (data.body.userId && this.userIdsWhoMeMuting.has(data.body.userId)) return;
 
 					if (data.body.note && data.body.note.isHidden) {
 						const note = await this.noteEntityService.pack(data.body.note.id, this.user, {
@@ -40,7 +40,7 @@ class MainChannel extends Channel {
 				case 'mention': {
 					if (isInstanceMuted(data.body, new Set<string>(this.userProfile?.mutedInstances ?? []))) return;
 
-					if (this.muting.has(data.body.userId)) return;
+					if (this.userIdsWhoMeMuting.has(data.body.userId)) return;
 					if (data.body.isHidden) {
 						const note = await this.noteEntityService.pack(data.body.id, this.user, {
 							detail: true,
diff --git a/packages/backend/src/server/api/stream/channels/user-list.ts b/packages/backend/src/server/api/stream/channels/user-list.ts
index 8a42e99a54..8802fc5ab8 100644
--- a/packages/backend/src/server/api/stream/channels/user-list.ts
+++ b/packages/backend/src/server/api/stream/channels/user-list.ts
@@ -89,11 +89,11 @@ class UserListChannel extends Channel {
 		}
 
 		// 流れてきたNoteがミュートしているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.muting)) return;
+		if (isUserRelated(note, this.userIdsWhoMeMuting)) return;
 		// 流れてきたNoteがブロックされているユーザーが関わるものだったら無視する
-		if (isUserRelated(note, this.blocking)) return;
+		if (isUserRelated(note, this.userIdsWhoBlockingMe)) return;
 
-		if (note.renote && !note.text && isUserRelated(note, this.renoteMuting)) return;
+		if (note.renote && !note.text && isUserRelated(note, this.userIdsWhoMeMutingRenotes)) return;
 
 		this.send('note', note);
 	}
diff --git a/packages/backend/src/server/api/stream/index.ts b/packages/backend/src/server/api/stream/index.ts
index 2f473cd012..a6f9145952 100644
--- a/packages/backend/src/server/api/stream/index.ts
+++ b/packages/backend/src/server/api/stream/index.ts
@@ -1,13 +1,11 @@
 import type { User } from '@/models/entities/User.js';
-import type { Channel as ChannelModel } from '@/models/entities/Channel.js';
-import type { FollowingsRepository, MutingsRepository, RenoteMutingsRepository, UserProfilesRepository, ChannelFollowingsRepository, BlockingsRepository } from '@/models/index.js';
 import type { AccessToken } from '@/models/entities/AccessToken.js';
-import type { UserProfile } from '@/models/entities/UserProfile.js';
 import type { Packed } from '@/misc/json-schema.js';
-import type { GlobalEventService } from '@/core/GlobalEventService.js';
 import type { NoteReadService } from '@/core/NoteReadService.js';
 import type { NotificationService } from '@/core/NotificationService.js';
 import { bindThis } from '@/decorators.js';
+import { CacheService } from '@/core/CacheService.js';
+import { UserProfile } from '@/models/index.js';
 import type { ChannelsService } from './ChannelsService.js';
 import type * as websocket from 'websocket';
 import type { EventEmitter } from 'events';
@@ -19,106 +17,71 @@ import type { StreamEventEmitter, StreamMessages } from './types.js';
  */
 export default class Connection {
 	public user?: User;
-	public userProfile?: UserProfile | null;
-	public following: Set<User['id']> = new Set();
-	public muting: Set<User['id']> = new Set();
-	public renoteMuting: Set<User['id']> = new Set();
-	public blocking: Set<User['id']> = new Set(); // "被"blocking
-	public followingChannels: Set<ChannelModel['id']> = new Set();
 	public token?: AccessToken;
 	private wsConnection: websocket.connection;
 	public subscriber: StreamEventEmitter;
 	private channels: Channel[] = [];
 	private subscribingNotes: any = {};
 	private cachedNotes: Packed<'Note'>[] = [];
+	public userProfile: UserProfile | null = null;
+	public following: Set<string> = new Set();
+	public followingChannels: Set<string> = new Set();
+	public userIdsWhoMeMuting: Set<string> = new Set();
+	public userIdsWhoBlockingMe: Set<string> = new Set();
+	public userIdsWhoMeMutingRenotes: Set<string> = new Set();
+	private fetchIntervalId: NodeJS.Timer | null = null;
 
 	constructor(
-		private followingsRepository: FollowingsRepository,
-		private mutingsRepository: MutingsRepository,
-		private renoteMutingsRepository: RenoteMutingsRepository,
-		private blockingsRepository: BlockingsRepository,
-		private channelFollowingsRepository: ChannelFollowingsRepository,
-		private userProfilesRepository: UserProfilesRepository,
 		private channelsService: ChannelsService,
-		private globalEventService: GlobalEventService,
 		private noteReadService: NoteReadService,
 		private notificationService: NotificationService,
+		private cacheService: CacheService,
 
-		wsConnection: websocket.connection,
 		subscriber: EventEmitter,
 		user: User | null | undefined,
 		token: AccessToken | null | undefined,
 	) {
-		this.wsConnection = wsConnection;
 		this.subscriber = subscriber;
 		if (user) this.user = user;
 		if (token) this.token = token;
+	}
 
-		//this.onWsConnectionMessage = this.onWsConnectionMessage.bind(this);
-		//this.onUserEvent = this.onUserEvent.bind(this);
-		//this.onNoteStreamMessage = this.onNoteStreamMessage.bind(this);
-		//this.onBroadcastMessage = this.onBroadcastMessage.bind(this);
-
-		this.wsConnection.on('message', this.onWsConnectionMessage);
-
-		this.subscriber.on('broadcast', data => {
-			this.onBroadcastMessage(data);
-		});
+	@bindThis
+	public async fetch() {
+		if (this.user == null) return;
+		const [userProfile, following, followingChannels, userIdsWhoMeMuting, userIdsWhoBlockingMe, userIdsWhoMeMutingRenotes] = await Promise.all([
+			this.cacheService.userProfileCache.fetch(this.user.id),
+			this.cacheService.userFollowingsCache.fetch(this.user.id),
+			this.cacheService.userFollowingChannelsCache.fetch(this.user.id),
+			this.cacheService.userMutingsCache.fetch(this.user.id),
+			this.cacheService.userBlockedCache.fetch(this.user.id),
+			this.cacheService.renoteMutingsCache.fetch(this.user.id),
+		]);
+		this.userProfile = userProfile;
+		this.following = following;
+		this.followingChannels = followingChannels;
+		this.userIdsWhoMeMuting = userIdsWhoMeMuting;
+		this.userIdsWhoBlockingMe = userIdsWhoBlockingMe;
+		this.userIdsWhoMeMutingRenotes = userIdsWhoMeMutingRenotes;
+	}
 
-		if (this.user) {
-			this.updateFollowing();
-			this.updateMuting();
-			this.updateRenoteMuting();
-			this.updateBlocking();
-			this.updateFollowingChannels();
-			this.updateUserProfile();
+	@bindThis
+	public async init() {
+		if (this.user != null) {
+			await this.fetch();
 
-			this.subscriber.on(`user:${this.user.id}`, this.onUserEvent);
+			this.fetchIntervalId = setInterval(this.fetch, 1000 * 10);
 		}
 	}
 
 	@bindThis
-	private onUserEvent(data: StreamMessages['user']['payload']) { // { type, body }と展開するとそれぞれ型が分離してしまう
-		switch (data.type) {
-			case 'follow':
-				this.following.add(data.body.id);
-				break;
-
-			case 'unfollow':
-				this.following.delete(data.body.id);
-				break;
-
-			case 'mute':
-				this.muting.add(data.body.id);
-				break;
-
-			case 'unmute':
-				this.muting.delete(data.body.id);
-				break;
-
-				// TODO: renote mute events
-				// TODO: block events
-
-			case 'followChannel':
-				this.followingChannels.add(data.body.id);
-				break;
-
-			case 'unfollowChannel':
-				this.followingChannels.delete(data.body.id);
-				break;
-
-			case 'updateUserProfile':
-				this.userProfile = data.body;
-				break;
-
-			case 'terminate':
-				this.wsConnection.close();
-				this.dispose();
-				break;
+	public async init2(wsConnection: websocket.connection) {
+		this.wsConnection = wsConnection;
+		this.wsConnection.on('message', this.onWsConnectionMessage);
 
-			default:
-				break;
-		}
+		this.subscriber.on('broadcast', data => {
+			this.onBroadcastMessage(data);
+		});
 	}
 
 	/**
@@ -318,78 +281,12 @@ export default class Connection {
 		}
 	}
 
-	@bindThis
-	private async updateFollowing() {
-		const followings = await this.followingsRepository.find({
-			where: {
-				followerId: this.user!.id,
-			},
-			select: ['followeeId'],
-		});
-
-		this.following = new Set<string>(followings.map(x => x.followeeId));
-	}
-
-	@bindThis
-	private async updateMuting() {
-		const mutings = await this.mutingsRepository.find({
-			where: {
-				muterId: this.user!.id,
-			},
-			select: ['muteeId'],
-		});
-
-		this.muting = new Set<string>(mutings.map(x => x.muteeId));
-	}
-
-	@bindThis
-	private async updateRenoteMuting() {
-		const renoteMutings = await this.renoteMutingsRepository.find({
-			where: {
-				muterId: this.user!.id,
-			},
-			select: ['muteeId'],
-		});
-
-		this.renoteMuting = new Set<string>(renoteMutings.map(x => x.muteeId));
-	}
-
-	@bindThis
-	private async updateBlocking() { // ここでいうBlockingは被Blockingの意
-		const blockings = await this.blockingsRepository.find({
-			where: {
-				blockeeId: this.user!.id,
-			},
-			select: ['blockerId'],
-		});
-
-		this.blocking = new Set<string>(blockings.map(x => x.blockerId));
-	}
-
-	@bindThis
-	private async updateFollowingChannels() {
-		const followings = await this.channelFollowingsRepository.find({
-			where: {
-				followerId: this.user!.id,
-			},
-			select: ['followeeId'],
-		});
-
-		this.followingChannels = new Set<string>(followings.map(x => x.followeeId));
-	}
-
-	@bindThis
-	private async updateUserProfile() {
-		this.userProfile = await this.userProfilesRepository.findOneBy({
-			userId: this.user!.id,
-		});
-	}
-
 	/**
 	 * ストリームが切れたとき
 	 */
 	@bindThis
 	public dispose() {
+		if (this.fetchIntervalId) clearInterval(this.fetchIntervalId);
 		for (const c of this.channels.filter(c => c.dispose)) {
 			if (c.dispose) c.dispose();
 		}
diff --git a/packages/backend/src/server/api/stream/types.ts b/packages/backend/src/server/api/stream/types.ts
index f4eedc3964..ed73897e73 100644
--- a/packages/backend/src/server/api/stream/types.ts
+++ b/packages/backend/src/server/api/stream/types.ts
@@ -38,6 +38,11 @@ export interface InternalStreamTypes {
 	antennaDeleted: Antenna;
 	antennaUpdated: Antenna;
 	metaUpdated: Meta;
+	followChannel: { userId: User['id']; channelId: Channel['id']; };
+	unfollowChannel: { userId: User['id']; channelId: Channel['id']; };
+	updateUserProfile: UserProfile;
+	mute: { muterId: User['id']; muteeId: User['id']; };
+	unmute: { muterId: User['id']; muteeId: User['id']; };
 }
 
 export interface BroadcastTypes {
@@ -56,18 +61,6 @@ export interface BroadcastTypes {
 	};
 }
 
-export interface UserStreamTypes {
-	terminate: Record<string, unknown>;
-	followChannel: Channel;
-	unfollowChannel: Channel;
-	updateUserProfile: UserProfile;
-	mute: User;
-	unmute: User;
-	follow: Packed<'UserDetailedNotMe'>;
-	unfollow: Packed<'User'>;
-	userAdded: Packed<'User'>;
-}
-
 export interface MainStreamTypes {
 	notification: Packed<'Notification'>;
 	mention: Packed<'Note'>;
@@ -200,10 +193,6 @@ export type StreamMessages = {
 		name: 'broadcast';
 		payload: EventUnionFromDictionary<SerializedAll<BroadcastTypes>>;
 	};
-	user: {
-		name: `user:${User['id']}`;
-		payload: EventUnionFromDictionary<SerializedAll<UserStreamTypes>>;
-	};
 	main: {
 		name: `mainStream:${User['id']}`;
 		payload: EventUnionFromDictionary<SerializedAll<MainStreamTypes>>;