{"id":9365,"date":"2025-11-26T11:51:09","date_gmt":"2025-11-26T02:51:09","guid":{"rendered":"https:\/\/fastcoding.jp\/blog\/?p=9365"},"modified":"2025-11-26T11:51:16","modified_gmt":"2025-11-26T02:51:16","slug":"web-worker-comlink-performance","status":"publish","type":"post","link":"https:\/\/fastcoding.jp\/blog\/all\/frontend\/web-worker-comlink-performance\/","title":{"rendered":"Web Worker\/Comlink\u3067”\u91cd\u3044\u51e6\u7406\u3092UI\u304b\u3089\u9694\u96e2”"},"content":{"rendered":"
\n

\u3053\u3093\u306b\u3061\u306f\u3001\u682a\u5f0f\u4f1a\u793e\u30d5\u30a1\u30b9\u30c8\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u30d5\u30eb\u30b9\u30bf\u30c3\u30af\u30a8\u30f3\u30b8\u30cb\u30a2 MrFire\u3067\u3059\u3002<\/p>\n\n\n\n

\u5148\u65e5\u3001\u8da3\u5473\u306e\u30d0\u30a4\u30af\u30c4\u30fc\u30ea\u30f3\u30b0\u3067\u30ed\u30b0\u30c7\u30fc\u30bf\u3092\u5206\u6790\u3059\u308bWeb\u30a2\u30d7\u30ea\u3092\u4f7f\u3063\u3066\u3044\u305f\u6642\u3001\u5927\u91cf\u306eGPS\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u8fbc\u3080\u305f\u3073\u306b\u753b\u9762\u304c\u5b8c\u5168\u306b\u30d5\u30ea\u30fc\u30ba\u3057\u3066\u3057\u307e\u3044\u3001\u30a4\u30e9\u30a4\u30e9\u3057\u305f\u7d4c\u9a13\u304c\u3042\u308a\u307e\u3057\u305f\u3002\u5165\u529b\u3082\u52b9\u304b\u306a\u3044\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u3082\u3067\u304d\u306a\u3044\u3002\u3053\u306e\u300c\u91cd\u3044\u51e6\u7406\u3067UI\u304c\u56fa\u307e\u308b\u300d\u554f\u984c\u306f\u3001Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306b\u304a\u3051\u308b\u5178\u578b\u7684\u306a\u8ab2\u984c\u3067\u3059\u3002\u30d0\u30a4\u30af\u306e\u30b9\u30d4\u30fc\u30c9\u3068\u540c\u3058\u3067\u3001\u53cd\u5fdc\u304c\u9045\u3044\u3068\u4e0d\u5feb\u3067\u3059\u3088\u306d\u3002<\/p>\n\n\n\n

\u5225\u306b\u8d70\u308a\u5c4b\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3002\u3002\u3002<\/p>\n\n\n\n

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JavaScript\u306f\u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\u3067\u52d5\u4f5c\u3059\u308b\u305f\u3081\u3001\u91cd\u3044\u51e6\u7406\u304c\u8d70\u308b\u3068\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u304c\u5360\u6709\u3055\u308c\u3001UI\u64cd\u4f5c\u304c\u3059\u3079\u3066\u30d6\u30ed\u30c3\u30af\u3055\u308c\u307e\u3059\u3002\u3088\u304f\u3042\u308b\u300c\u91cd\u3044\u300d\u51e6\u7406\u306a\u306e\u304c\u691c\u7d22\u7d50\u679c\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u51e6\u7406\u3002\u4e00\u5ea6\u691c\u7d22\u3067\u5f97\u305f\u30c7\u30fc\u30bf\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3084\u4e26\u3079\u304b\u3048\u3092\u3001\u3067\u304d\u308b\u3060\u3051\u30b9\u30e0\u30fc\u30ba\u306b\u3084\u308a\u305f\u3044\u304b\u3089\u30d5\u30ed\u30f3\u30c8\u3067\u51e6\u7406\u3057\u3066\u3057\u307e\u3046\u3068\u3044\u3046\u306e\u306f\u3001\u6c17\u6301\u3061\u308f\u304b\u308b\u3093\u3067\u3059\u304c\u3001\u30c7\u30fc\u30bf\u91cf\u304c\u591a\u3044\u3053\u3068\u3067\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u304c\u5c02\u6709\u3055\u308c\u3066\u3057\u307e\u3044\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u6570\u79d2\u9593\u3001\u4f55\u3082\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u753b\u9762\u304c\u56fa\u307e\u308b\u3068\u3044\u3046\u72b6\u614b\u306b\u306a\u308b\u306e\u3067\u3001INP(Interaction to Next Paint)\u304c\u60aa\u5316\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u304c\u8457\u3057\u304f\u640d\u306a\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

Web Worker\u3067\u51e6\u7406\u3092\u5225\u30b9\u30ec\u30c3\u30c9\u5316\u3059\u308b<\/h2>\n\n\n\n

Web Worker\u3092\u4f7f\u3048\u3070\u3001\u91cd\u3044\u51e6\u7406\u3092\u5225\u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\u3057\u3001\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u3092\u89e3\u653e\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u5f93\u6765\u306eWorker\u5b9f\u88c5\u306b\u306f\u8ab2\u984c\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

\u5f93\u6765\u306eWorker\u5b9f\u88c5\u306e\u554f\u984c\u70b9<\/h3>\n\n\n\n

\u6614\u304b\u3089\u3042\u308bpostMessage\u65b9\u5f0f<\/strong><\/p>\n\n\n

\n\/\/ main.js\nconst worker = new Worker('worker.js');\n\nworker.postMessage({ type: 'PROCESS_CSV', data: csvData });\n\nworker.onmessage = (event) => {\n  if (event.data.type === 'RESULT') {\n    console.log(event.data.result);\n  }\n};\n\n\/\/ worker.js\nself.onmessage = (event) => {\n  if (event.data.type === 'PROCESS_CSV') {\n    const result = processCSV(event.data.data);\n    self.postMessage({ type: 'RESULT', result });\n  }\n};\n<\/pre><\/div>\n\n\n
\u3044\u3061\u3070\u3093\u77e5\u3089\u308c\u3066\u3044\u308b\u306e\u306fpostMessage\u3067\u306f\u306a\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u5b9f\u88c5\u306b\u306f\u4e00\u82e6\u52b4\u3067\u3059\u3002<\/p>\n\n\n\n
\u4f8b\u3048\u3070Promise\u3092\u4f7f\u3044\u305f\u3044\u5834\u5408\u3001\u81ea\u5206\u3067Promise\u30e9\u30c3\u30d1\u30fc\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u304c\u3001Worker\u5074\u3067\u51e6\u7406\u304c\u5b8c\u4e86\u3057\u305f\u3089\u3001\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u5074\u306ePromise\u3092resolve\u3059\u308b\u4ed5\u7d44\u307f\u3092\u3001requestId\u7ba1\u7406\u3068\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u30de\u30c3\u30d7\u3092\u4f7f\u3063\u3066\u81ea\u524d\u3067\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u975e\u5e38\u306b\u7169\u96d1\u3067\u3001\u30b3\u30fc\u30c9\u304c\u80a5\u5927\u5316\u3057\u3001\u30d0\u30b0\u306e\u6e29\u5e8a\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u307e\u305f\u3001postMessage\u3068onmessage\u306e\u30da\u30a2\u3092\u4f55\u5ea6\u3082\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308a\u3001\u540c\u3058\u3088\u3046\u306a\u51e6\u7406\u304c\u7f85\u5217\u3057\u305f\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3001\u3001\u3001\u3001\u3068\u3044\u3046\u898b\u305f\u304f\u306a\u3044\u7d50\u679c\u306b\u306a\u308a\u304c\u3061\u3067\u3059\u3002\u30e1\u30c3\u30bb\u30fc\u30b8\u9001\u4fe1\u2192\u53d7\u4fe1\u306e\u305f\u3073\u306b\u3001type\u30c1\u30a7\u30c3\u30af\u3001\u30c7\u30fc\u30bf\u53d6\u308a\u51fa\u3057\u3001\u30ec\u30b9\u30dd\u30f3\u30b9\u69cb\u7bc9\u3068\u3044\u3046\u5b9a\u578b\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u7d9a\u3051\u308b\u3053\u3068\u306b\u306a\u3063\u3066\u3044\u304d\u307e\u3059\u3002\u8907\u6570\u306e\u51e6\u7406\u3092\u9023\u9396\u3055\u305b\u305f\u3044\u5834\u5408\u306f\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u5730\u7344\u306b\u9665\u308a\u304c\u3061\u3067\u3059\u3002<\/p>\n\n\n\n
\u3055\u3089\u306b\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3082\u8907\u96d1\u3067\u3059\u3002Worker\u5185\u3067\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3001\u305d\u308c\u3092\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u306b\u9069\u5207\u306b\u4f1d\u3048\u308b\u4ed5\u7d44\u307f\u3092\u81ea\u5206\u3067\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30a8\u30e9\u30fc\u306e\u7a2e\u985e\u3054\u3068\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u30bf\u30a4\u30d7\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u308c\u305e\u308c\u306b\u5bfe\u5fdc\u3059\u308b\u30cf\u30f3\u30c9\u30e9\u30fc\u3092\u66f8\u3044\u3066\u3044\u304f\u3068\u3044\u3046\u4fee\u884c\u306e\u3088\u3046\u306a\u4f5c\u696d\u3002\u3002\u3002TypeScript\u3092\u4f7f\u3063\u3066\u3044\u3066\u3082\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u30bf\u30a4\u30d7\u304c\u6587\u5b57\u5217\u30d9\u30fc\u30b9\u306e\u305f\u3081\u578b\u5b89\u5168\u6027\u304c\u6d3b\u304b\u305b\u305a\u3001\u4f8b\u3048\u3070’PROCESS_CSV’\u3068\u3044\u3046\u30bf\u30a4\u30d7\u540d\u3092\u30bf\u30a4\u30d7\u30df\u30b9\u3057\u3066\u3082\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u306f\u691c\u51fa\u3055\u308c\u307e\u305b\u3093\u3002\u79c1\u305f\u3061\u306e\u958b\u767a\u73fe\u5834\u3067\u3082\u3001\u3053\u306e\u65b9\u5f0f\u3092\u4f7f\u3063\u3066\u3044\u305f\u6642\u671f\u304c\u3042\u308a\u307e\u3057\u305f\u304c\u3001\u66f8\u304f\u306e\u3082\u3064\u3089\u3044\u3057\u30d0\u30b0\u3082\u591a\u3044\u3057\u3068\u3001\u3001\u3001\u306a\u3063\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
Comlink\u3067\u578b\u5b89\u5168\u306aRPC\u901a\u4fe1\u3092\u5b9f\u73fe<\/h3>\n\n\n\n
\u305d\u3093\u306a\u4e2d\u73fe\u308c\u305f\u6551\u4e16\u4e3b\u306fComlink<\/a>\u3002Comlink\u306f\u3001Web Worker\u3068\u306e\u3084\u308a\u53d6\u308a\u3092RPC(Remote Procedure Call)\u30b9\u30bf\u30a4\u30eb\u3067\u5b9f\u73fe\u3059\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002\u578b\u5b89\u5168\u6027\u3092\u4fdd\u3061\u306a\u304c\u3089\u3001\u307e\u308b\u3067\u30ed\u30fc\u30ab\u30eb\u95a2\u6570\u3092\u547c\u3076\u3088\u3046\u306b Worker \u306e\u95a2\u6570\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
Good Case: Comlink\u3092\u4f7f\u3063\u305f\u5b9f\u88c5<\/strong><\/p>\n\n\n
\n\/\/ worker.ts\nimport { expose } from 'comlink';\n\nconst api = {\n  async processCSV(data: string): Promise<ProcessedData> {\n    \/\/ \u91cd\u3044\u51e6\u7406\n    const rows = data.split('\\n');\n    const processed = rows.map(row => {\n      \/\/ \u8907\u96d1\u306a\u96c6\u8a08\u51e6\u7406\n      return analyzeRow(row);\n    });\n    return { items: processed, total: processed.length };\n  },\n  \n  async processImage(imageData: ImageData): Promise<Blob> {\n    \/\/ \u753b\u50cf\u51e6\u7406\n    const canvas = new OffscreenCanvas(imageData.width, imageData.height);\n    const ctx = canvas.getContext('2d')!;\n    ctx.putImageData(imageData, 0, 0);\n    \/\/ \u30ea\u30b5\u30a4\u30ba\u30fb\u5727\u7e2e\u51e6\u7406\n    return canvas.convertToBlob({ type: 'image\/jpeg', quality: 0.8 });\n  }\n};\n\nexpose(api);\n\n\/\/ main.ts\nimport { wrap, Remote } from 'comlink';\n\nconst worker = new Worker(new URL('.\/worker.ts', import.meta.url), {\n  type: 'module'\n});\n\nconst api: Remote<typeof workerApi> = wrap(worker);\n\n\/\/ \u578b\u5b89\u5168\u306b\u547c\u3073\u51fa\u305b\u308b\nconst result = await api.processCSV(csvData);\nconsole.log(result.total); \/\/ TypeScript\u306e\u578b\u63a8\u8ad6\u304c\u52b9\u304f\n<\/pre><\/div>\n\n\n
Comlink\u3092\u4f7f\u3046\u4e00\u756a\u5927\u304d\u306a\u30e1\u30ea\u30c3\u30c8\u306f\u3001TypeScript\u306e\u578b\u5b9a\u7fa9\u304c\u305d\u306e\u307e\u307e\u4f7f\u3048\u308b\u3053\u3068\u3067\u3059\u3002Worker\u5074\u3067\u5b9a\u7fa9\u3057\u305f\u95a2\u6570\u306e\u578b\u304c\u3001\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u5074\u3067\u3082\u5b8c\u5168\u306b\u4fdd\u6301\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001IDE\u306e\u88dc\u5b8c\u3082\u52b9\u304d\u307e\u3059\u3057\u3001\u578b\u30a8\u30e9\u30fc\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u691c\u51fa\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u307e\u305f\u3001async\/await\u3067\u81ea\u7136\u306b\u66f8\u3051\u308b\u306e\u3082\u5927\u304d\u306a\u5229\u70b9\u3067\u3059\u3002\u5f93\u6765\u306epostMessage\u65b9\u5f0f\u3067\u306f\u3001\u975e\u540c\u671f\u51e6\u7406\u3092\u6271\u3046\u305f\u3081\u306b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u5730\u7344\u306b\u9665\u308a\u304c\u3061\u3067\u3057\u305f\u304c\u3001Comlink\u3092\u4f7f\u3048\u3070\u666e\u901a\u306e\u975e\u540c\u671f\u95a2\u6570\u3068\u540c\u3058\u3088\u3046\u306b\u66f8\u3051\u307e\u3059\u3002Promise\u304c\u81ea\u52d5\u7684\u306b\u51e6\u7406\u3055\u308c\u308b\u305f\u3081\u3001Worker\u5074\u3067Promise\u3092\u8fd4\u305b\u3070\u3001\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u5074\u3067await\u3059\u308b\u3060\u3051\u3067\u7d50\u679c\u304c\u5f97\u3089\u308c\u307e\u3059\u3002\u30a8\u30e9\u30fc\u3082\u9069\u5207\u306b\u4f1d\u64ad\u3059\u308b\u305f\u3081\u3001try-catch\u3067\u901a\u5e38\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u304c\u53ef\u80fd\u3067\u3059\u3002\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u5c0e\u5165\u3057\u305f\u3068\u3053\u308d\u3001\u30b3\u30fc\u30c9\u91cf\u304c30%\u524a\u6e1b\u3055\u308c\u3001\u30d0\u30b0\u3082\u6fc0\u6e1b\u3057\u307e\u3057\u305f\uff08\u5fc3\u7406\u7684\u306b\u3082\u3068\u3063\u3066\u3082\u697d\u306b\uff09\u3002<\/p>\n\n\n\n
\u30ef\u30fc\u30ab\u30fc\u5316\u306e\u63a1\u7528\u5224\u65ad\u57fa\u6e96<\/h2>\n\n\n\n
\u3067\u306f\u3059\u3079\u3066\u306e\u51e6\u7406\u3092Worker\u5316\u3059\u308c\u3070\u3044\u3044\u306e\u304b\u3068\u3044\u3046\u3068\u3001\u3053\u308c\u306f\u307e\u305f\u305d\u3046\u3044\u3046\u308f\u3051\u3067\u3082\u306a\u3044\u3093\u3067\u3059\u3002\u9069\u5207\u306a\u5224\u65ad\u57fa\u6e96\u3092\u6301\u3064\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\u5224\u65ad\u57fa\u6e96<\/th>Worker\u5316\u63a8\u5968<\/th>\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u3067OK<\/th><\/tr><\/thead>
\u51e6\u7406\u6642\u9593<\/td>>50ms<\/td><50ms<\/td><\/tr>
\u30c7\u30fc\u30bf\u91cf<\/td>>1MB<\/td><1MB<\/td><\/tr>
DOM\u64cd\u4f5c<\/td>\u4e0d\u8981<\/td>\u5fc5\u8981<\/td><\/tr>
\u5b9f\u884c\u983b\u5ea6<\/td>\u983b\u7e41<\/td>\u307e\u308c<\/td><\/tr>
\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u3078\u306e\u5f71\u97ff<\/td>INP\u60aa\u5316\u304c\u9855\u8457<\/td>\u5f71\u97ff\u8efd\u5fae<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u5f0a\u793e\u3060\u3068\u3001\u3060\u3044\u305f\u3044Chrome DevTools\u306ePerformance\u30bf\u30d6\u3067\u300cLong Tasks(50ms\u4ee5\u4e0a)\u300d\u304c\u983b\u767a\u3059\u308b\u5834\u5408\u306b\u3001Worker\u5316\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002\u51e6\u7406\u6642\u9593\u304c50ms\u3092\u8d85\u3048\u308b\u3068\u3001\u4f53\u611f\u7684\u306b\u3082\u660e\u3089\u304b\u306a\u9045\u5ef6\u3092\u611f\u3058\u307e\u3059\u3002\u307e\u305f\u3001\u30c7\u30fc\u30bf\u91cf\u304c1MB\u3092\u8d85\u3048\u308b\u5834\u5408\u3082\u3001\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u306e\u30b3\u30b9\u30c8\u3092\u8003\u616e\u3057\u3066\u3082Worker\u5316\u306e\u307b\u3046\u304c\u3044\u3044\u3001\u3068\u306a\u308b\u30d1\u30bf\u30fc\u30f3\u3082\u591a\u3044\u3067\u3059\u3002<\/p>\n\n\n\n
\u5b9f\u88c5\u30b9\u30c6\u30c3\u30d7\u3068\u5b9f\u8df5\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n\n\n
\u3053\u3053\u304b\u3089\u306f\u5b9f\u969b\u306bComlink\u3092\u4f7f\u3063\u305fWorker\u5316\u306e\u3001\u57fa\u672c\u7684\u306b\u306a\u6d41\u308c\u3092\u66f8\u3044\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u30b9\u30c6\u30c3\u30d71: \u91cd\u3044\u95a2\u6570\u3092Worker\u3078\u5206\u96e2<\/h3>\n\n\n\n
\u307e\u305a\u3001\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u91cd\u3044\u95a2\u6570\u3092\u7279\u5b9a\u3057\u3001Worker\u30d5\u30a1\u30a4\u30eb\u306b\u79fb\u52d5\u3057\u307e\u3059\u3002<\/p>\n\n\n
\n\/\/ \u5143\u306e\u30b3\u30fc\u30c9(main.ts)\nfunction analyzeLogData(logs: LogEntry[]): AnalysisResult {\n  \/\/ \u91cd\u3044\u96c6\u8a08\u51e6\u7406\n  const grouped = groupBy(logs, 'userId');\n  const stats = calculateStatistics(grouped);\n  return { grouped, stats };\n}\n\n\/\/ Worker\u5316\u5f8c(worker.ts)\nimport { expose } from 'comlink';\n\nconst api = {\n  analyzeLogData(logs: LogEntry[]): AnalysisResult {\n    const grouped = groupBy(logs, 'userId');\n    const stats = calculateStatistics(grouped);\n    return { grouped, stats };\n  }\n};\n\nexpose(api);\n<\/pre><\/div>\n\n\n
\u30b9\u30c6\u30c3\u30d72: \u8ee2\u9001\u53ef\u80fd\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u9ad8\u901f\u5316<\/h3>\n\n\n\n
\u5927\u304d\u306a\u30c7\u30fc\u30bf\u3092Worker\u306b\u6e21\u3059\u969b\u3001\u901a\u5e38\u306f\u30c7\u30fc\u30bf\u304c\u30b3\u30d4\u30fc\u3055\u308c\u307e\u3059(\u69cb\u9020\u5316\u8907\u88fd)\u3002\u3053\u308c\u306f\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u5927\u304d\u3044\u305f\u3081\u3001\u8ee2\u9001\u53ef\u80fd\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(Transferable Objects)\u3092\u4f7f\u3044\u307e\u3059\u3002\u3044\u308f\u3086\u308bBuffer\u7cfb\u3067\u3059\u306d\u3002ArrayBuffer\u3084ImageData\u306a\u3069\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30b3\u30d4\u30fc\u3067\u306f\u306a\u304f\u30dd\u30a4\u30f3\u30bf\uff08\u3067\u306f\u306a\u3044\u3068\u601d\u3044\u307e\u3059\u304c\u4ed6\u306b\u8a00\u3044\u65b9\u304c\u5206\u304b\u3089\u306a\u3044\u306e\u3067\u30fb\u30fb\u30fb\uff09\u3067\u79fb\u52d5\u304c\u53ef\u80fd\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u306e\u30b3\u30d4\u30fc\u30b3\u30b9\u30c8\u304c\u30bc\u30ed\u306b\u306a\u308a\u3001\u5927\u5e45\u306a\u9ad8\u901f\u5316\u304c\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n
\n\/\/ main.ts\nimport { transfer } from 'comlink';\n\n\/\/ ArrayBuffer\u3084ImageData\u306a\u3069\u306f\u8ee2\u9001\u53ef\u80fd\nconst buffer = new ArrayBuffer(1024 * 1024 * 10); \/\/ 10MB\nconst result = await api.processBuffer(transfer(buffer, [buffer]));\n\n\/\/ buffer\u306f\u3082\u3046\u4f7f\u3048\u306a\u3044(\u30dd\u30a4\u30f3\u30bf\u304cWorker\u306b\u79fb\u52d5)\nconsole.log(buffer.byteLength); \/\/ 0\n<\/pre><\/div>\n\n\n
\u8ee2\u9001\u53ef\u80fd\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u3046\u3068\u300110MB\u306e\u30c7\u30fc\u30bf\u3067\u3082\u6570\u30df\u30ea\u79d2\u3067\u8ee2\u9001\u3067\u304d\u307e\u3059\u3002\u901a\u5e38\u306e\u30b3\u30d4\u30fc\u3060\u3068\u6570\u767e\u30df\u30ea\u79d2\u304b\u304b\u308b\u305f\u3081\u3001\u6570\u5341\u500d\u306e\u9ad8\u901f\u5316\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u8ee2\u9001\u5f8c\u306f\u5143\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u4f7f\u3048\u306a\u304f\u306a\u308b\u305f\u3081\u3001\u3042\u3068\u304b\u3089\u4f7f\u3046\u3088\u3046\u306a\u30c7\u30fc\u30bf\u306e\u7ba1\u7406\u306b\u306f\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
\u30b9\u30c6\u30c3\u30d73: \u30ad\u30e3\u30f3\u30bb\u30eb\u30fb\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306e\u5b9f\u88c5<\/h3>\n\n\n\n
\u9577\u6642\u9593\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\u306b\u306f\u3001\u30ad\u30e3\u30f3\u30bb\u30eb\u6a5f\u80fd\u3068\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3082\u5b9f\u88c5\u3057\u307e\u3057\u3087\u3046\u3002\u30e6\u30fc\u30b6\u30fc\u304c\u51e6\u7406\u3092\u4e2d\u65ad\u3057\u305f\u3044\u5834\u5408\u3084\u3001\u51e6\u7406\u304c\u60f3\u5b9a\u4ee5\u4e0a\u306b\u6642\u9593\u304c\u304b\u304b\u308b\u5834\u5408\u306b\u5bfe\u5fdc\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n
\n\/\/ worker.ts\nconst api = {\n  async processWithCancel(\n    data: string,\n    signal: AbortSignal\n  ): Promise<Result> {\n    const chunks = splitIntoChunks(data);\n    const results = [];\n    \n    for (const chunk of chunks) {\n      \/\/ \u30ad\u30e3\u30f3\u30bb\u30eb\u30c1\u30a7\u30c3\u30af\n      if (signal.aborted) {\n        throw new Error('\u51e6\u7406\u304c\u30ad\u30e3\u30f3\u30bb\u30eb\u3055\u308c\u307e\u3057\u305f');\n      }\n      results.push(processChunk(chunk));\n    }\n    \n    return { results };\n  }\n};\n\n\/\/ main.ts\nconst controller = new AbortController();\n\n\/\/ 10\u79d2\u3067\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\nconst timeoutId = setTimeout(() => controller.abort(), 10000);\n\ntry {\n  const result = await api.processWithCancel(data, controller.signal);\n  clearTimeout(timeoutId);\n} catch (error) {\n  console.error('\u51e6\u7406\u5931\u6557:', error);\n}\n<\/pre><\/div>\n\n\n
\u5171\u901aWorker\u30a2\u30c0\u30d7\u30bf\u306e\u5b9f\u88c5<\/h2>\n\n\n\n
\u8907\u6570\u306eWorker\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u5171\u901a\u30a2\u30c0\u30d7\u30bf\u3082\u4f5c\u308a\u307e\u3057\u3087\u3046\u3002\u3064\u307e\u308aWorker\u306e\u751f\u6210\u3001\u7d42\u4e86\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u4e00\u7b87\u6240\u306b\u307e\u3068\u3081\u3066\u304a\u304f\u3053\u3068\u3067\u3001Worker\u81ea\u4f53\u306e\u51e6\u7406\u306f\u4eca\u5f8c\u8003\u3048\u306a\u304f\u3066\u3082\u3088\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n
\n\/\/ workerAdapter.ts\nimport { wrap, Remote } from 'comlink';\n\nexport class WorkerAdapter<T> {\n  private worker: Worker;\n  private api: Remote<T>;\n  private isTerminated = false;\n\n  constructor(workerUrl: URL) {\n    this.worker = new Worker(workerUrl, { type: 'module' });\n    this.api = wrap<T>(this.worker);\n  }\n\n  getAPI(): Remote<T> {\n    if (this.isTerminated) {\n      throw new Error('Worker is already terminated');\n    }\n    return this.api;\n  }\n\n  terminate(): void {\n    this.worker.terminate();\n    this.isTerminated = true;\n  }\n\n  \/\/ \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\n  onError(handler: (error: ErrorEvent) => void): void {\n    this.worker.addEventListener('error', handler);\n  }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nconst csvWorker = new WorkerAdapter<typeof csvWorkerApi>(\n  new URL('.\/csvWorker.ts', import.meta.url)\n);\n\ncsvWorker.onError((error) => {\n  console.error('Worker error:', error);\n  \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u9001\u4fe1\u3001\u518d\u8d77\u52d5\u306a\u3069\n});\n\nconst result = await csvWorker.getAPI().processCSV(data);\n<\/pre><\/div>\n\n\n
\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u3068\u5bfe\u7b56<\/h2>\n\n\n\n
\u843d\u3068\u3057\u7a741: \u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u30b3\u30b9\u30c8\u306e\u904e\u591a<\/h3>\n\n\n\n
\u5c0f\u3055\u306a\u30c7\u30fc\u30bf\u3092\u983b\u7e41\u306bWorker\u306b\u9001\u308b\u3068\u3001\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u306e\u8a08\u7b97\u91cf\u304c\u51e6\u7406\u306b\u5f71\u97ff\u3057\u3066\u304f\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u306f\u30c7\u30fc\u30bf\u3092Worker\u306b\u9001\u308b\u3068\u304d\u306b\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u5c0f\u3055\u306a\u30c7\u30fc\u30bf\u3067\u3082\u3001\u3053\u306e\u51e6\u7406\u306b\u306f\u6570\u30df\u30ea\u79d2\u304b\u304b\u308a\u307e\u3059\u30021\u4ef6\u305a\u3064\u9001\u308b\u3068\u3001\u6bce\u56de\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u304c\u767a\u751f\u3057\u3001\u30c8\u30fc\u30bf\u30eb\u3067\u5927\u304d\u306a\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u60aa\u3044\u4f8b<\/strong><\/p>\n\n\n
\n\/\/ 1\u4ef6\u305a\u3064Worker\u306b\u9001\u308b(\u975e\u52b9\u7387)\nfor (const item of items) {\n  await api.processItem(item); \/\/ \u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u304c\u6bce\u56de\u767a\u751f\n}\n<\/pre><\/div>\n\n\n
\u826f\u3044\u4f8b<\/strong><\/p>\n\n\n
\n\/\/ \u30d0\u30c3\u30c1\u3067\u9001\u308b\nconst result = await api.processBatch(items); \/\/ \u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u306f1\u56de\u3060\u3051\n<\/pre><\/div>\n\n\n
\u3088\u304f\u4f7f\u3046\u306e\u306f\u30d0\u30c3\u30c1\u51e6\u7406\u304b\u306a\u3068\u601d\u3044\u307e\u3059\u3002\u9001\u4fe1\u81ea\u4f53\u3092\u5225\u95a2\u6570\u5316\uff08\u30d0\u30c3\u30c1\u5316\uff09\u3057\u3066\u304a\u3044\u3066\u3001\u30d0\u30c3\u30c1\u95a2\u6570\u5185\u3067\u5b9a\u671f\u7684\u306b\u6e9c\u307e\u3063\u305f\u3089\u9001\u308b\u3088\u3046\u306b\u5b9f\u88c5\u3057\u307e\u3059\u3002\u9001\u308b\u3068\u304d\u306e\u57fa\u6e96\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u3057\u3066\u304a\u3051\u3070\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u8a66\u3057\u306a\u304c\u3089\u8abf\u6574\u3067\u304d\u307e\u3059\u3057\u4fbf\u5229\u3067\u3059\u3002\u5b9f\u969b\u3053\u306e\u30d0\u30c3\u30c1\u5316\u3060\u3051\u3067\u4f53\u611f\u901f\u5ea6\u3042\u304c\u3063\u305f\u304a\u5ba2\u69d8\u3082\u3044\u3089\u3063\u3057\u3083\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
\u843d\u3068\u3057\u7a742: \u4f8b\u5916\u306e\u63e1\u308a\u3064\u3076\u3057<\/h3>\n\n\n\n
Worker\u5185\u306e\u30a8\u30e9\u30fc\u306f\u9069\u5207\u306b\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3057\u306a\u3044\u3068\u3001\u30c7\u30d0\u30c3\u30b0\u304c\u56f0\u96e3\u306b\u306a\u308a\u307e\u3059\u3002Worker\u5185\u3067\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3082\u3001\u305d\u308c\u3092\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u306b\u4f1d\u3048\u306a\u3051\u308c\u3070\u3001\u51e6\u7406\u304c\u5931\u6557\u3057\u305f\u3053\u3068\u3059\u3089\u5206\u304b\u308a\u307e\u305b\u3093\u3002\u7279\u306b\u3001try-catch\u3067\u30a8\u30e9\u30fc\u3092\u63e1\u308a\u3064\u3076\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u4f55\u304c\u8d77\u304d\u305f\u306e\u304b\u5168\u304f\u5206\u304b\u3089\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n
\n\/\/ worker.ts\nconst api = {\n  async processData(data: string): Promise<Result> {\n    try {\n      return heavyProcess(data);\n    } catch (error) {\n      \/\/ \u30a8\u30e9\u30fc\u3092\u9069\u5207\u306b\u4f1d\u3048\u308b\n      console.error('Worker error:', error);\n      throw new Error(`\u51e6\u7406\u5931\u6557: ${error.message}`);\n    }\n  }\n};\n\n\/\/ main.ts\ntry {\n  const result = await api.processData(data);\n} catch (error) {\n  \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u9001\u4fe1\n  sendErrorLog({\n    message: error.message,\n    stack: error.stack,\n    context: 'CSV processing'\n  });\n  \/\/ \u30e6\u30fc\u30b6\u30fc\u3078\u306e\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\n  showErrorNotification('\u30c7\u30fc\u30bf\u51e6\u7406\u306b\u5931\u6557\u3057\u307e\u3057\u305f');\n}\n<\/pre><\/div>\n\n\n
DOM\u51e6\u7406\u3060\u3063\u305f\u308a\u30d6\u30e9\u30a6\u30b6\u5185\u3067\u5b8c\u7d50\u3055\u305b\u3066\u3044\u308b\u8a08\u7b97\u306b\u6bd4\u3079\u308c\u3070\u3001Worker\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u7d61\u3080\u3053\u3068\u3082\u591a\u3044\u306e\u3067\u3001\u30c7\u30d0\u30c3\u30b0\u304c\u7d50\u69cb\u9762\u5012\u306b\u306a\u308a\u307e\u3059\u3002\u8ee2\u3070\u306c\u5148\u306e\u6756\u3058\u3083\u306a\u3044\u3067\u3059\u304c\u3001\u6700\u521d\u306e\u6bb5\u968e\u304b\u3089\u30a8\u30e9\u30fc\u51e6\u7406\u3084\u4f8b\u5916\u51e6\u7406\u306f\u304d\u3061\u3093\u3068\u7d44\u3093\u3067\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u843d\u3068\u3057\u7a743: \u30e1\u30e2\u30ea\u30ea\u30fc\u30af<\/h3>\n\n\n\n
\u4f7f\u3063\u305fWorker\u306f\u6700\u5f8c\u3001\u9069\u5207\u306b\u7d42\u4e86\u3057\u3066\u304a\u304b\u306a\u3044\u3068\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u304c\u767a\u751f\u3057\u304c\u3061\u3067\u3059\u3002\u7279\u306bSPA\u3067\u30da\u30fc\u30b8\u9077\u79fb\u3092\u7e70\u308a\u8fd4\u3059\u5834\u5408\u3001Worker\u304c\u84c4\u7a4d\u3057\u3066\u30e1\u30e2\u30ea\u3092\u5727\u8feb\u3057\u307e\u3059\u3002<\/p>\n\n\n
\n\/\/ \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u691c\u51fa\nclass WorkerPool {\n  private workers: Worker[] = [];\n\n  createWorker(): Worker {\n    const worker = new Worker('.\/worker.js');\n    this.workers.push(worker);\n    return worker;\n  }\n\n  terminateAll(): void {\n    this.workers.forEach(w => w.terminate());\n    this.workers = [];\n  }\n}\n\n\/\/ React\u3067\u306e\u4f7f\u7528\u4f8b\nuseEffect(() => {\n  const pool = new WorkerPool();\n  const worker = pool.createWorker();\n  \n  return () => {\n    pool.terminateAll(); \/\/ \u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u5fc5\u9808\n  };\n}, []);\n<\/pre><\/div>\n\n\n
React\u306e\u3088\u3046\u306a\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3042\u308c\u3070\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u30a2\u30f3\u30de\u30a6\u30f3\u30c8\u6642\u306bWorker\u3092\u78ba\u5b9f\u306b\u7d42\u4e86\u3055\u305b\u307e\u3057\u3087\u3046\u3002\u305f\u3068\u3048\u3070useEffect\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u95a2\u6570\u3067\u5fc5\u305aterminate\u3092\u547c\u3076\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u306d\u3002WorkerPool\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u8907\u6570\u306eWorker\u3092\u4e00\u62ec\u7ba1\u7406\u3067\u304d\u3001\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3052\u307e\u3059\u3002<\/p>\n\n\n\n
\u307e\u3068\u3081<\/h2>\n\n\n\n
Worker\u5316\u3092\u3059\u308b\u3001\u3068\u3044\u3046\u3053\u3068\u81ea\u4f53\u3001\u3060\u3044\u305f\u3044\u65e2\u5b58\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u3084\u308b\u3053\u3068\u304c\u591a\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u3060\u3093\u3060\u3093\u5229\u7528\u8005\u304c\u5897\u3048\u3066\u304d\u305f\u308a\u3001\u30c7\u30fc\u30bf\u91cf\u304c\u5897\u3048\u3066\u304d\u3066\uff08\u304a\u5ba2\u69d8\u304b\u3089\u306a\u3093\u304b\u91cd\u3044\u3088\u306d\u3001\u3001\u3001\u3063\u3066\u8a00\u308f\u308c\u51fa\u3057\u3066\uff09\u8003\u3048\u308b\u4f5c\u6226\u306e1\u3064\u3060\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u3067\u3082\u306a\u304b\u306a\u304b\u65e2\u5b58\u30b3\u30fc\u30c9\u3092\u5909\u3048\u3089\u308c\u306a\u3044\u30fb\u5909\u3048\u308b\u306e\u304c\u6016\u3044\u3001\u3001\u3068\u3044\u3046\u73fe\u5834\u3082\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u3002\u682a\u5f0f\u4f1a\u793e\u30d5\u30a1\u30b9\u30c8\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3067\u306f\u3001\u3053\u3046\u3044\u3063\u305f\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u7d4c\u9a13\u304c\u8c4a\u5bcc\u306b\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u305d\u3046\u3044\u3046\u3068\u304d\u306f\u3001\u305c\u3072\u304a\u6c17\u8efd\u306b\u3054\u76f8\u8ac7\u304f\u3060\u3055\u3044\u3002\u306a\u3093\u304b\u91cd\u3044\u3088\u306d\u3050\u3089\u3044\u3067\u3001\u307e\u305a\u306f\u30d5\u30a1\u30b9\u30c8\u306b\u76f8\u8ac7\u3059\u308b\u3050\u3089\u3044\u306b\u601d\u3063\u3066\u3082\u3089\u3048\u308c\u3070\u3044\u3044\u3068\u601d\u3044\u307e\u3059\uff08\u6fc0\u91cd\u30fbUI\u30d5\u30ea\u30fc\u30ba\u72b6\u614b\u306b\u306a\u308b\u3068\u3001\u3082\u3046\u624b\u306b\u8ca0\u3048\u306a\u304f\u306a\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u306e\u3067\uff09\u3002<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"
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