2016-05-31 91 views
0

我一直在嘗試從ReactJS Tutorials來學習React和Webpack。 我的問題是當我從我的所有文件的頂級目錄中運行webpack時,通常需要大約62392ms。但是,在教程中,他需要1394ms。我讀過排除的應該有助於提高性能的時間,但我已經排除了node_modules。我試着開關我裝載機只是巴貝爾並把它帶到我的WebPack時間縮短到13183ms,但似乎仍然非常緩慢,特別是當它只是transpiling一個文件(client.js)。有沒有人知道爲什麼運行webpack命令是如此緩慢,因爲大多數其他stackoverflow答案似乎指向包括/排除路徑/目錄,我已經這樣做?即使我排除了node_modules,爲什麼Webpack命令需要這麼長時間?

我的文件結構如下:

node_modules 
src 
-> js 
->-> client.js 
-> client.min.js 
-> index.html 
.gitignore 
package.json 
webpack.config.js 

我webpack.config.js樣子:

var debug = process.env.NODE_ENV !== "production"; 
var webpack = require('webpack'); 
var path = require('path'); 

module.exports = { 
    context: __dirname + "/src", 
    devtool: debug ? "inline-sourcemap" : null, 
    entry: "./js/client.js", 
    module: { 
    loaders: [ 
     { 
     target: 'node', 
     test: /\.jsx?$/, 
     //include: [path.resolve(__dirname, "./src")], 
     exclude: /node_modules/, 
     loader: 'babel-loader', 
     query: { 
      presets: ['react', 'es2015', 'stage-0'], 
      plugins: ['react-html-attrs', 'transform-class-properties', 'transform-decorators-legacy'], 
     } 
     } 
    ] 
    }, 
    output: { 
    path: __dirname + "/src/", 
    filename: "client.min.js" 
    }, 
    plugins: debug ? [] : [ 
    new webpack.optimize.DedupePlugin(), 
    new webpack.optimize.OccurenceOrderPlugin(), 
    new webpack.optimize.UglifyJsPlugin({ mangle: false, sourcemap: false }), 
    ], 
}; 

而且我的package.json樣子:

{ 
    "name": "module-loaders", 
    "version": "1.0.0", 
    "description": "Learning React and Webpack through LearnCode.academy", 
    "main": "index.js", 
    "scripts": { 
    "test": "echo \"Error: no test specified\" && exit 1" 
    }, 
    "repository": { 
    "type": "git", 
    "url": "git+https://github.com/dustinchang/React_Learning_LearnCode.Academy.git" 
    }, 
    "author": "", 
    "license": "ISC", 
    "bugs": { 
    "url": "https://github.com/dustinchang/React_Learning_LearnCode.Academy/issues" 
    }, 
    "homepage": "https://github.com/dustinchang/React_Learning_LearnCode.Academy#readme", 
    "dependencies": { 
    "babel-core": "^6.9.1", 
    "babel-loader": "^6.2.0", 
    "babel-plugin-add-module-exports": "^0.1.2", 
    "babel-plugin-react-html-attrs": "^2.0.0", 
    "babel-plugin-transform-class-properties": "^6.3.13", 
    "babel-plugin-transform-decorators-legacy": "^1.3.4", 
    "babel-preset-es2015": "^6.3.13", 
    "babel-preset-react": "^6.3.13", 
    "babel-preset-stage-0": "^6.3.13", 
    "react": "^0.14.6", 
    "react-dom": "^0.14.6", 
    "webpack": "^1.13.1", 
    "webpack-dev-server": "^1.14.1" 
    } 
} 

我非常感謝任何建議。

+0

sourcemap - > slow,babel - > slow,UglifyJsPlugin - > slow。嘗試運行webpack --json --progress --profile> stats.json並將其加載到分析工具中以查看更多詳細信息 –

+0

您說該教程比您的項目更快:它們之間的區別是什麼?如果您的文件遠遠多於教程項目以及更多的依賴關係,它可以解釋這種差異。 –

+0

唯一的依賴差異是我添加了babel-core,因爲我在某處讀取嘗試使用babel而不是babel-loader,這雖然在一定程度上提高了性能,但仍然很慢,然後webpack-dev-server只是稍微進一步在教程中。 – dlchang

回答

0

在Windows上,您可以激活緩存目錄babel選項](https://github.com/babel/babel-loader#options)。重新加載時,它爲我節省了很多時間。

+0

我認爲,它不能在MacOS上工作,因爲如果我切換到使用babel-loader?cacheDirectory時出現錯誤。 – dlchang

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