perf: Improve network request performance (#7636)

* perf: Improve fetch

* CHANGELOG

* lifo

2 files changed, 27 insertions, 15 deletions

diff --git a/src/@types/lookup-dns-cache.d.ts b/src/@types/lookup-dns-cache.d.ts
deleted file mode 100644
index bae9df5faf..0000000000
--- a/src/@types/lookup-dns-cache.d.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-declare module 'lookup-dns-cache' {
-	import { LookupOneOptions, LookupAllOptions, LookupOptions, LookupAddress } from 'dns';
-
-	function lookup(hostname: string, family: number, callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void): void;
-	function lookup(hostname: string, options: LookupOneOptions, callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void): void;
-	function lookup(hostname: string, options: LookupAllOptions, callback: (err: NodeJS.ErrnoException | null, addresses: LookupAddress[]) => void): void;
-	function lookup(hostname: string, options: LookupOptions, callback: (err: NodeJS.ErrnoException | null, address: string | LookupAddress[], family: number) => void): void;
-	function lookup(hostname: string, callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void): void;
-}
diff --git a/src/misc/fetch.ts b/src/misc/fetch.ts
index 37f8203543..f7756f9256 100644
--- a/src/misc/fetch.ts
+++ b/src/misc/fetch.ts
@@ -1,9 +1,8 @@
 import * as http from 'http';
 import * as https from 'https';
-import * as cache from 'lookup-dns-cache';
+import CacheableLookup from 'cacheable-lookup';
 import fetch, { HeadersInit } from 'node-fetch';
-import { HttpProxyAgent } from 'http-proxy-agent';
-import { HttpsProxyAgent } from 'https-proxy-agent';
+import { HttpProxyAgent, HttpsProxyAgent } from 'hpagent';
 import config from '@/config';
 import { URL } from 'url';
 
@@ -49,6 +48,12 @@ export async function getHtml(url: string, accept = 'text/html, */*', timeout =
 	return await res.text();
 }
 
+const cache = new CacheableLookup({
+	maxTtl: 3600,	// 1hours
+	errorTtl: 30,	// 30secs
+	lookup: false,	// nativeのdns.lookupにfallbackしない
+});
+
 /**
  * Get http non-proxy agent
  */
@@ -65,20 +70,36 @@ const _https = new https.Agent({
 	keepAlive: true,
 	keepAliveMsecs: 30 * 1000,
 	lookup: cache.lookup,
-});
+} as https.AgentOptions);
+
+const maxSockets = Math.max(256, config.deliverJobConcurrency || 128);
 
 /**
  * Get http proxy or non-proxy agent
  */
 export const httpAgent = config.proxy
-	? new HttpProxyAgent(config.proxy)
+	? new HttpProxyAgent({
+		keepAlive: true,
+		keepAliveMsecs: 30 * 1000,
+		maxSockets,
+		maxFreeSockets: 256,
+		scheduling: 'lifo',
+		proxy: config.proxy
+	})
 	: _http;
 
 /**
  * Get https proxy or non-proxy agent
  */
 export const httpsAgent = config.proxy
-	? new HttpsProxyAgent(config.proxy)
+	? new HttpsProxyAgent({
+		keepAlive: true,
+		keepAliveMsecs: 30 * 1000,
+		maxSockets,
+		maxFreeSockets: 256,
+		scheduling: 'lifo',
+		proxy: config.proxy
+	})
 	: _https;
 
 /**