mirror of
https://github.com/status-im/metro.git
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1dec296000
Summary:
Uglify@3.1.7 is causing some perf issues (more specifically, this commit: 5b4b07e9a7) that are impacting TTI on RN views and increased memory usage.
More specifically, code like:
```
function nonTrivialFn(pre) {
return pre + Math.random();
}
function hotFunctionCalledALotOfTimes(num) {
return nonTrivialFn(num + Math.random());
}
hotFunctionCalledALotOfTimes(3);
hotFunctionCalledALotOfTimes(5);
```
in v3.1.7 gets converted to:
```
function hotFunctionCalledALotOfTimes(num){
return function(pre) {
return pre + Math.random();
}(num + Math.random())
}
hotFunctionCalledALotOfTimes(3);
hotFunctionCalledALotOfTimes(5);
```
This causes a function creation each time `hotFunctionCalledALotOfTimes` is called.
By comparison, in v3.1.6, that previous code was converted to:
```
function nonTrivialFn(pre){
return pre + Math.random()
}
function hotFunctionCalledALotOfTimes(num){
return nonTrivialFn(num + Math.random())
}
hotFunctionCalledALotOfTimes(3);
hotFunctionCalledALotOfTimes(5);
```
Reviewed By: jeanlauliac, alexeylang
Differential Revision: D6296740
fbshipit-source-id: b3988d886e607103ec3ae6b9763b2f0411a8aa3c
54 lines
1.5 KiB
JSON
54 lines
1.5 KiB
JSON
{
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"version": "0.21.0",
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"name": "metro-bundler",
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"description": "🚇 The JavaScript bundler for React Native.",
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"main": "src/index.js",
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"repository": {
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"type": "git",
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"url": "git@github.com:facebook/metro-bundler.git"
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},
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"scripts": {
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"prepare-release": "test -d build && rm -rf src.real && mv src src.real && mv build src",
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"cleanup-release": "test ! -e build && mv src build && mv src.real src"
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},
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"dependencies": {
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"absolute-path": "^0.0.0",
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"async": "^2.4.0",
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"babel-core": "^6.24.1",
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"babel-generator": "^6.26.0",
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"babel-plugin-external-helpers": "^6.18.0",
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"babel-preset-es2015-node": "^6.1.1",
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"babel-preset-fbjs": "^2.1.4",
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"babel-preset-react-native": "^4.0.0",
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"babel-register": "^6.24.1",
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"babylon": "^6.18.0",
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"chalk": "^1.1.1",
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"concat-stream": "^1.6.0",
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"core-js": "^2.2.2",
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"debug": "^2.2.0",
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"denodeify": "^1.2.1",
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"fbjs": "^0.8.14",
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"graceful-fs": "^4.1.3",
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"image-size": "^0.6.0",
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"jest-docblock": "21.3.0-beta.8",
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"jest-haste-map": "21.3.0-beta.8",
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"jest-worker": "21.3.0-beta.8",
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"json-stable-stringify": "^1.0.1",
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"json5": "^0.4.0",
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"left-pad": "^1.1.3",
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"lodash": "^4.16.6",
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"merge-stream": "^1.0.1",
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"mime-types": "2.1.11",
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"mkdirp": "^0.5.1",
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"request": "^2.79.0",
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"rimraf": "^2.5.4",
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"source-map": "^0.5.6",
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"temp": "0.8.3",
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"throat": "^4.1.0",
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"uglify-es": "^3.1.0",
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"wordwrap": "^1.0.0",
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"write-file-atomic": "^1.2.0",
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"xpipe": "^1.0.5"
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}
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}
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