角度2 'recompile'慢。Visual Studio 2015.任务运行程序。打字稿

Question

>问题：对我的 Angular2 项目 Typescript 文件进行任何更改（包括仅添加空格）几乎需要 3 分钟才能"重新编译"，然后 Web 浏览器刷新并显示更改。这会减慢整体发展速度。

Background:
    Using Visual Studio 2015 running on Amazon WorkSpace with 2 cores and 8GB of memory. 
    Using Task Runner Explorer (start from package.json).
    Created a dummy project with source code from
        angular.io (Heros project).
        todomvc.com (ToDo list).
        and dummy Test component.

This is a tiny project, but still takes almost 3 minutes to 'recompile'. Below is the Task Runner log showing that it takes almost 3 minutes to 'recompile' even though i only added a single space to heroes.component.ts file.
By comparison, I have an asp.net project on the same machine (vb.net) with hundreds of files and it compiles in seconds.
I tried disabling Trend Micro real time virus scanner but that didn't seem to have any effect.
Question: Is this normal behavior?! How can I get this running fast?
[0] 13:11:07 - File change detected. Starting incremental compilation...
[1] [BS] File changed: appdashboard.component.js
[1] [BS] File changed: apphero-detail.component.js
[1] [BS] File changed: apptodo.store.js
[1] [BS] File changed: apptodo.component.js
[0] 13:11:17 - Compilation complete. Watching for file changes.
[1] [BS] File changed: apptest.component.js
[1] [BS] File changed: appapp.component.js
[1] [BS] File changed: appmain.js
[1] 16.02.29 13:11:07 304 GET /index.html
[1] 16.02.29 13:11:10 304 GET /styles.css
[1] 16.02.29 13:11:14 304 GET /app/main.ts
[1] [BS] File changed: apphero.js
[1] [BS] File changed: appmock-heroes.js
[1] [BS] File changed: apphero.service.js
[1] [BS] File changed: appdashboard.component.js
[1] [BS] File changed: apphero-detail.component.js
[1] [BS] File changed: appheroes.component.js
[1] 16.02.29 13:11:20 304 GET /app/app.component.ts
[1] [BS] File changed: apptodo.component.js
[1] [BS] File changed: apptodo.store.js
[1] [BS] File changed: apptest.component.js
[1] [BS] File changed: appapp.component.js
[1] [BS] File changed: appmain.js
[1] 16.02.29 13:11:23 304 GET /app/hero.service.ts
[1] 16.02.29 13:11:23 304 GET /app/dashboard.component.ts
[1] 16.02.29 13:11:24 304 GET /app/hero-detail.component.ts
[1] 16.02.29 13:11:24 304 GET /app/todo.component.ts
[1] 16.02.29 13:11:24 304 GET /app/todo.store.ts
[1] 16.02.29 13:11:26 304 GET /index.html
[1] 16.02.29 13:11:27 304 GET /app/test.component.ts
[1] 16.02.29 13:11:27 304 GET /app/mock-heroes.ts
[1] 16.02.29 13:11:29 304 GET /styles.css
[1] 16.02.29 13:11:33 304 GET /app/main.ts
[1] 16.02.29 13:11:38 304 GET /app/app.component.ts
[1] 16.02.29 13:12:25 304 GET /app/hero.service.ts
[1] 16.02.29 13:12:25 304 GET /app/dashboard.component.ts
[1] 16.02.29 13:12:27 304 GET /app/hero-detail.component.ts
[1] 16.02.29 13:12:27 304 GET /app/todo.component.ts
[1] 16.02.29 13:12:43 304 GET /app/todo.store.ts
[1] 16.02.29 13:12:44 200 GET /app/heroes.component.ts
[1] 16.02.29 13:12:45 200 GET /app/test.component.ts
[1] 16.02.29 13:12:46 200 GET /app/mock-heroes.ts
[1] 16.02.29 13:13:11 304 GET /app/app.component.css
[1] 16.02.29 13:13:45 304 GET /app/dashboard.component.html
[1] 16.02.29 13:13:58 304 GET /app/dashboard.component.css

Answer 1

仔细检查您是否在项目中正确设置了"排除"目录。我的猜测是Visual Studio正试图转译所有内容。

您应该在Typescript目录中有一个tsconfig.json文件。它应该看起来像这样：

{
  "compilerOptions": {
    "noImplicitAny": false,
    "noEmitOnError": true,
    "removeComments": false,
    "sourceMap": false,
    "target": "es5",
    "module": "commonjs",
    "outDir": "../wwwroot/app/",
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
  },
  "exclude": [
    "node_modules",
    "wwwroot"
  ]
}

另外，请注意，outDir 是排除的目录之一。