{"id":198,"date":"2026-03-09T15:52:02","date_gmt":"2026-03-09T15:52:02","guid":{"rendered":"https:\/\/blog.rebalai.com\/ja\/2026\/03\/09\/bun-vs-nodejs-in-production-2026-real-migration-st\/"},"modified":"2026-03-09T22:00:15","modified_gmt":"2026-03-09T22:00:15","slug":"bun-vs-nodejs-in-production-2026-real-migration-st","status":"publish","type":"post","link":"https:\/\/blog.rebalai.com\/ja\/2026\/03\/09\/bun-vs-nodejs-in-production-2026-real-migration-st\/","title":{"rendered":"Bun vs Node.js \u672c\u756a\u74b0\u5883 2026: 2\u9031\u9593\u306e\u79fb\u884c\u5b9f\u9a13\u3067\u5206\u304b\u3063\u305f\u3053\u3068"},"content":{"rendered":"<p>\u3046\u3061\u306e\u30c1\u30fc\u30e0\u306f4\u4eba\u3067\u3001BtoB\u306eSaaS\u30d7\u30ed\u30c0\u30af\u30c8\u3092\u904b\u55b6\u3057\u3066\u3044\u308b\u3002\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306eAPI\u306f\u305a\u3063\u3068Node.js 20 LTS\u3067\u52d5\u304b\u3057\u3066\u3044\u3066\u3001Bun\u306e\u5b58\u5728\u306f2\u5e74\u4ee5\u4e0a\u524d\u304b\u3089\u77e5\u3063\u3066\u3044\u305f\u3051\u3069\u300c\u307e\u3060\u672c\u756a\u306b\u306f\u65e9\u3044\u300d\u3068\u3044\u3046\u5370\u8c61\u304c\u62ed\u3048\u306a\u304f\u3066\u69d8\u5b50\u898b\u3057\u3066\u305f\u3002<\/p>\n<p>\u8ee2\u6a5f\u306b\u306a\u3063\u305f\u306e\u306f\u53bb\u5e74\u672b\u3002\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u5316\u3092\u5c11\u3057\u305a\u3064\u9032\u3081\u3066\u3044\u3066\u3001\u30b3\u30f3\u30c6\u30ca\u306e\u30b3\u30fc\u30eb\u30c9\u30b9\u30bf\u30fc\u30c8\u304c\u5730\u5473\u306b\u554f\u984c\u306b\u306a\u3063\u3066\u304d\u305f\u3002\u500b\u5225\u306b\u306f130\u301c180ms\u7a0b\u5ea6\u3060\u3051\u3069\u3001\u305d\u308c\u304c\u9023\u9396\u3059\u308b\u3068\u30e6\u30fc\u30b6\u30fc\u306b\u898b\u3048\u308b\u5f62\u3067\u30ec\u30a4\u30c6\u30f3\u30b7\u306b\u97ff\u3044\u3066\u304f\u308b\u3002\u305d\u308c\u3067\u300cBun 1.3\u30012\u9031\u9593\u3060\u3051\u672c\u756a\u76f8\u5f53\u306e\u74b0\u5883\u3067\u691c\u8a3c\u3057\u3066\u307f\u3088\u3046\u300d\u3068\u3044\u3046\u8a71\u306b\u306a\u3063\u305f\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u306f\u3001\u305d\u306e2\u9031\u9593\u3067\u5206\u304b\u3063\u305f\u3053\u3068\u3092\u305d\u306e\u307e\u307e\u66f8\u3044\u305f\u3082\u306e\u3002<\/p>\n<hr \/>\n<h2>\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u306e\u6570\u5b57: \u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306a\u3057\u306b\u306f\u610f\u5473\u304c\u306a\u3044<\/h2>\n<p>\u307e\u305a\u5b9f\u6e2c\u5024\u304b\u3089\u51fa\u3057\u3066\u304a\u304f\u3002\u30c6\u30b9\u30c8\u74b0\u5883\u306fAWS t3.medium\u3001Amazon Linux 2023\u3002\u5bfe\u8c61\u306f\u793e\u5185\u306e\u8efd\u91cf\u306aREST API\uff08\u4f9d\u5b58\u30d1\u30c3\u30b1\u30fc\u30b8\u6570 \u7d0440\uff09\u3092\u30d9\u30fc\u30b9\u306b\u4f5c\u3063\u305f\u30c6\u30b9\u30c8\u7528\u30b5\u30fc\u30d3\u30b9\u3002<\/p>\n<p><strong>\u30b3\u30fc\u30eb\u30c9\u30b9\u30bf\u30fc\u30c8\uff08<code>\/health<\/code>\u3078\u306e\u521d\u56de\u5fdc\u7b54\u307e\u3067\uff09<\/strong><br \/>\n&#8211; Node.js 22.x LTS: \u5e73\u5747 <strong>171ms<\/strong><br \/>\n&#8211; Bun 1.3: \u5e73\u5747 <strong>29ms<\/strong><\/p>\n<p><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\uff08\u30a2\u30a4\u30c9\u30eb\u6642\uff09<\/strong><br \/>\n&#8211; Node.js: \u301c<strong>47MB<\/strong><br \/>\n&#8211; Bun: \u301c<strong>20MB<\/strong><\/p>\n<p><strong>\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\uff08wrk\u300112\u30b9\u30ec\u30c3\u30c9\u3001400\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u300130\u79d2\uff09<\/strong><br \/>\n&#8211; Node.js + Express: \u301c<strong>27,800 req\/s<\/strong><br \/>\n&#8211; Bun + Hono: \u301c<strong>62,400 req\/s<\/strong><\/p>\n<p>\u6570\u5b57\u3060\u3051\u898b\u308b\u3068\u300c\u5168\u90e8Bun\u306b\u79fb\u884c\u3057\u3088\u3046\u300d\u3063\u3066\u306a\u308b\u3093\u3060\u3051\u3069\u3001\u4e00\u500b\u91cd\u8981\u306a\u3053\u3068\u304c\u3042\u308b\u3002\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u306e\u6bd4\u8f03\u3067Bun + Hono\u3092\u4f7f\u3063\u3066\u3044\u308b\u306e\u306f\u3001\u300c\u540c\u3058\u3082\u306e\u3092\u901f\u304f\u3057\u305f\u300d\u306e\u3067\u306f\u306a\u304f\u3001<strong>\u5225\u306e\u30b9\u30bf\u30c3\u30af\u306b\u4e57\u308a\u63db\u3048\u3066\u3044\u308b<\/strong>\u3093\u3060\u3088\u306d\u3002Hono\u306f\u3068\u3066\u3082\u901f\u3044\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3060\u3051\u3069\u3001Express\u306e\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u3068\u306f\u5225\u7269\u3002\u3053\u3053\u3092\u6df7\u540c\u3059\u308b\u3068\u79fb\u884c\u30b3\u30b9\u30c8\u3092\u898b\u8aa4\u308b\u3002<\/p>\n<p>\u5b9f\u969b\u306eHono + Bun\u6700\u5c0f\u69cb\u6210\u306f\u3053\u3093\u306a\u611f\u3058\u3002TypeScript\u3092\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\u306a\u3057\u3067\u52d5\u304b\u305b\u308b\u306e\u306f\u3001\u5730\u5473\u306b\u4f53\u9a13\u3068\u3057\u3066\u826f\u304b\u3063\u305f\u3002<\/p>\n<pre><code class=\"language-typescript\">\/\/ hono + bun: \u6700\u5c0f\u69cb\u6210\uff08bun run src\/index.ts \u3067\u76f4\u63a5\u52d5\u304f\uff09\nimport { Hono } from 'hono'\nimport { logger } from 'hono\/logger'\n\nconst app = new Hono()\n\napp.use('*', logger())\n\napp.get('\/health', (c) =&gt; c.json({ status: 'ok', runtime: 'bun' }))\n\napp.get('\/users\/:id', async (c) =&gt; {\n  const id = c.req.param('id')\n  \/\/ Bun\u306e\u30d3\u30eb\u30c8\u30a4\u30f3sqlite\u304c\u4f7f\u3048\u308b\u5834\u5408\u306f\u3053\u3053\u3067\u76f4\u63a5\u30af\u30a8\u30ea\n  const user = await db.query('SELECT * FROM users WHERE id = ?', [id])\n  return c.json(user)\n})\n\nexport default app\n\/\/ bun --hot src\/index.ts \u3067\u30db\u30c3\u30c8\u30ea\u30ed\u30fc\u30c9\u3082\u52d5\u304f\n<\/code><\/pre>\n<p>\u305f\u3060\u3001\u3053\u306e\u69cb\u6210\u3067\u300c\u65e2\u5b58\u306eExpress\u30d9\u30fc\u30b9\u306e\u30b3\u30fc\u30c9\u3092\u305d\u306e\u307e\u307e\u52d5\u304b\u305d\u3046\u300d\u3068\u3059\u308b\u3068\u8a70\u307e\u308b\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u304c\u305d\u306e\u8a71\u3002<\/p>\n<hr \/>\n<h2>\u672c\u756a\u79fb\u884c\u3067\u8a70\u307e\u3063\u305f3\u3064\u306e\u30dd\u30a4\u30f3\u30c8<\/h2>\n<p><strong>Datadog\u306eAPM\u304c\u52d5\u304b\u306a\u304b\u3063\u305f<\/strong><\/p>\n<p>\u6700\u521d\u306e\u30cf\u30de\u308a\u3002<code>dd-trace<\/code>\u306fNode.js\u306eV8\u5185\u90e8\u30d5\u30c3\u30af\u3001\u7279\u306b<code>--require<\/code>\u30d5\u30e9\u30b0\u3068\u30a4\u30f3\u30b9\u30da\u30af\u30bf\u30fcAPI\u306e\u7279\u5b9a\u306e\u6319\u52d5\u306b\u4f9d\u5b58\u3057\u3066\u3044\u3066\u3001Bun\u3067\u306f\u305d\u306e\u521d\u671f\u5316\u30b7\u30fc\u30b1\u30f3\u30b9\u304c\u9055\u3046\u3002\u8d77\u52d5\u6642\u306e\u30c8\u30ec\u30fc\u30b9\u304c\u5168\u304f\u53d6\u308c\u306a\u304f\u306630\u5206\u304f\u3089\u3044\u60a9\u3093\u3060\u3002<\/p>\n<p>\u8abf\u3079\u305f\u3089\u3001Datadog\u516c\u5f0f\u306eBun\u30b5\u30dd\u30fc\u30c8\u306f2025\u5e74\u590f\u306eGitHub issue\u6bb5\u968e\u3067\u306f\u300cexperimental\u300d\u306e\u307e\u307e\u3067\u30011.3\u6642\u70b9\u3067\u3082\u300c\u5b8c\u5168\u5bfe\u5fdc\u300d\u3068\u306f\u8a00\u3048\u306a\u3044\u72b6\u6cc1\u3060\u3063\u305f\u3002<\/p>\n<p>\u89e3\u6c7a\u7b56\u306fOpenTelemetry\u30d9\u30fc\u30b9\u3078\u306e\u5207\u308a\u66ff\u3048\u3002Datadog Agent\u306fOTLP\u3092\u53d7\u3051\u4ed8\u3051\u308b\u306e\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304d\u63db\u3048\u305f\u3089\u52d5\u3044\u305f\u3002<\/p>\n<pre><code class=\"language-typescript\">\/\/ dd-trace\u306e\u4ee3\u66ff: OpenTelemetry SDK\u3092Bun\u3067\u4f7f\u3046\nimport { NodeSDK } from '@opentelemetry\/sdk-node'\nimport { OTLPTraceExporter } from '@opentelemetry\/exporter-trace-otlp-http'\nimport { getNodeAutoInstrumentations } from '@opentelemetry\/auto-instrumentations-node'\n\nconst sdk = new NodeSDK({\n  traceExporter: new OTLPTraceExporter({\n    url: process.env.OTEL_EXPORTER_OTLP_ENDPOINT ?? 'http:\/\/localhost:4318\/v1\/traces',\n  }),\n  instrumentations: [getNodeAutoInstrumentations()],\n})\n\nsdk.start()\n\n\/\/ Bun\u3067\u306fSIGTERM\u306e\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u660e\u793a\u7684\u306b\u3084\u3089\u306a\u3044\u3068shutdown\u304c\u8d70\u3089\u306a\u3044\u3053\u3068\u304c\u3042\u308b\nprocess.on('SIGTERM', async () =&gt; {\n  await sdk.shutdown()\n  process.exit(0)\n})\n<\/code><\/pre>\n<p>Datadog\u3092\u4f7f\u3063\u3066\u3044\u308b\u306a\u3089\u3001OTLP\u3078\u306e\u79fb\u884c\u3092\u5148\u306b\u8a08\u753b\u3057\u3066\u304b\u3089Bun\u79fb\u884c\u306b\u5165\u308b\u3053\u3068\u3002\u3053\u308c\u3092\u5f8c\u56de\u3057\u306b\u3059\u308b\u3068\u78ba\u5b9f\u306b\u8a70\u307e\u308b\u3002<\/p>\n<p><strong><code>node:crypto<\/code> \u306eSubtle API\u3067\u91d1\u66dc\u306e\u5348\u5f8c\u306b\u3084\u3089\u304b\u3057\u305f<\/strong><\/p>\n<p>\u3053\u308c\u304c\u4e00\u756a\u7126\u3063\u305f\u3002\u91d1\u66dc\u306e\u5348\u5f8c\u306b\u30b9\u30c6\u30fc\u30b8\u30f3\u30b0\u304b\u3089\u672c\u756a\u306b\u4e0a\u3052\u305f\u30b5\u30fc\u30d3\u30b9\u3067\u3001JWT\u306e\u691c\u8a3c\u304c\u4e00\u90e8\u901a\u3089\u306a\u304f\u306a\u3063\u305f\u3002\u5177\u4f53\u7684\u306b\u306fRSA-PSS\u7f72\u540d\u306e\u691c\u8a3c\u3067\u3001Node.js\u3068Bun\u306eWebCrypto\u5b9f\u88c5\u306e\u6319\u52d5\u304c\u5fae\u5999\u306b\u9055\u3063\u3066\u305f\u3002<\/p>\n<p>\u6700\u521d\u306f\u300cBun\u306e\u30d0\u30b0\u304b\uff1f\u300d\u3068\u601d\u3063\u305f\u3093\u3060\u3051\u3069\u2014\u2014\u8abf\u3079\u305f\u3089\u9006\u3067\u3001Bun\u306fW3C\u4ed5\u69d8\u306b\u6cbf\u3063\u305f\u5b9f\u88c5\u3092\u3057\u3066\u3044\u3066\u3001Node.js\u306e\u65b9\u304c\u72ec\u81ea\u306e\u6319\u52d5\u3092\u3057\u3066\u3044\u305f\uff08Bun\u306eissue tracker\u3067\u540c\u69d8\u306e\u8b70\u8ad6\u304c\u3044\u304f\u3064\u304b\u898b\u3064\u304b\u3063\u305f\uff09\u3002<\/p>\n<p>\u6b63\u76f4\u3001\u300c\u3069\u3061\u3089\u304c\u4ed5\u69d8\u7684\u306b\u6b63\u3057\u3044\u304b\u300d\u306f\u3069\u3046\u3067\u3082\u3088\u304b\u3063\u305f\u3002\u52d5\u3044\u3066\u3044\u305f\u3082\u306e\u304c\u52d5\u304b\u306a\u304f\u306a\u3063\u305f\u3001\u305d\u308c\u3060\u3051\u304c\u554f\u984c\u3067\u3002\u7d50\u5c40\u3001JWT\u30e9\u30a4\u30d6\u30e9\u30ea\u5074\u3067<code>jose<\/code>\u306b\u5207\u308a\u66ff\u3048\u3066\u3001\u76f4\u63a5<code>SubtleCrypto<\/code>\u3092\u89e6\u308b\u30b3\u30fc\u30c9\u3092\u30e9\u30c3\u30d7\u3059\u308b\u3053\u3068\u3067\u56de\u907f\u3057\u305f\u3002\u672c\u756a\u3078\u306e\u5f71\u97ff\u306f\u6700\u5c0f\u9650\u3067\u6e08\u3093\u3060\u3051\u3069\u3001crypto\u5468\u308a\u306f\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3002<\/p>\n<p><strong><code>bun:test<\/code>\u306fJest\u3067\u306f\u306a\u3044<\/strong><\/p>\n<p>\u3053\u308c\u306f\u5b8c\u5168\u306b\u81ea\u5206\u306e\u601d\u3044\u8fbc\u307f\u304c\u539f\u56e0\u3002Bun\u306e\u30c6\u30b9\u30c8\u30e9\u30f3\u30ca\u30fc\u306fJest\u3068\u4f3c\u305f\u69cb\u6587\u306a\u306e\u3067\u300c\u305d\u306e\u307e\u307e\u52d5\u304f\u3060\u308d\u300d\u3068\u601d\u3063\u3066\u79fb\u884c\u3057\u59cb\u3081\u305f\u3089\u3001<code>jest.spyOn<\/code>\u306e\u30ea\u30b9\u30c8\u30a2\u6319\u52d5\u3084\u3001\u4e00\u90e8\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u30e2\u30c3\u30af\u6a5f\u80fd\u304c\u5fae\u5999\u306b\u9055\u3063\u305f\u3002\u57fa\u672c\u7684\u306a\u30c6\u30b9\u30c8\u306f\u52d5\u3044\u305f\u3051\u3069\u3001\u65e2\u5b58\u30c6\u30b9\u30c8\u306e\u7d0420%\u306b\u4fee\u6b63\u304c\u5fc5\u8981\u3060\u3063\u305f\u3002\u5c0f\u3055\u304f\u306a\u3044\u30b3\u30b9\u30c8\u3002<\/p>\n<hr 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