22 |
23 | Put this loader in front of other loaders. The following loaders run in a worker pool.
24 |
25 | Loaders running in a worker pool are limited. Examples:
26 |
27 | * Loaders cannot emit files.
28 | * Loaders cannot use custom loader API (i. e. by plugins).
29 | * Loaders cannot access the webpack options.
30 |
31 | Each worker is a separate node.js process, which has an overhead of ~600ms. There is also an overhead of inter-process communication.
32 |
33 | Use this loader only for expensive operations!
34 |
35 |
Examples
36 |
37 | **webpack.config.js**
38 |
39 | ```js
40 | module.exports = {
41 | module: {
42 | rules: [
43 | {
44 | test: /\.js$/,
45 | include: path.resolve("src"),
46 | use: [
47 | "thread-loader",
48 | // your expensive loader (e.g babel-loader)
49 | ]
50 | }
51 | ]
52 | }
53 | }
54 | ```
55 |
56 | **with options**
57 |
58 | ```js
59 | use: [
60 | {
61 | loader: "thread-loader",
62 | // loaders with equal options will share worker pools
63 | options: {
64 | // the number of spawned workers, defaults to (number of cpus - 1) or
65 | // fallback to 1 when require('os').cpus() is undefined
66 | workers: 2,
67 |
68 | // number of jobs a worker processes in parallel
69 | // defaults to 20
70 | workerParallelJobs: 50,
71 |
72 | // additional node.js arguments
73 | workerNodeArgs: ['--max-old-space-size=1024'],
74 |
75 | // Allow to respawn a dead worker pool
76 | // respawning slows down the entire compilation
77 | // and should be set to false for development
78 | poolRespawn: false,
79 |
80 | // timeout for killing the worker processes when idle
81 | // defaults to 500 (ms)
82 | // can be set to Infinity for watching builds to keep workers alive
83 | poolTimeout: 2000,
84 |
85 | // number of jobs the poll distributes to the workers
86 | // defaults to 200
87 | // decrease of less efficient but more fair distribution
88 | poolParallelJobs: 50,
89 |
90 | // name of the pool
91 | // can be used to create different pools with elsewise identical options
92 | name: "my-pool"
93 | }
94 | },
95 | // your expensive loader (e.g babel-loader)
96 | ]
97 | ```
98 |
99 | **prewarming**
100 |
101 | To prevent the high delay when booting workers it possible to warmup the worker pool.
102 |
103 | This boots the max number of workers in the pool and loads specified modules into the node.js module cache.
104 |
105 | ``` js
106 | const threadLoader = require('thread-loader');
107 |
108 | threadLoader.warmup({
109 | // pool options, like passed to loader options
110 | // must match loader options to boot the correct pool
111 | }, [
112 | // modules to load
113 | // can be any module, i. e.
114 | 'babel-loader',
115 | 'babel-preset-es2015',
116 | 'sass-loader',
117 | ]);
118 | ```
119 |
120 |
121 |
10 |
11 | 
129 |
130 | sokra
131 |
132 |