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Mangle exported symbols (#182935)

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* Mangle exported functions

For #180461

This prototype tries to mangle exported functions, saving a further 440kb from the bundle size

* Fix missing call

* Also try mangling top level exported consts too

* Fixing errors

* Don't run on build files

* Skip a few more manglings and revert change to namespace

* Skip a few more monaco files

* Also mangle consts that shadow types

This increases savings up to 3325

* Also mangle exported classes

* Skip mangling more localization functions for now

* Opt out pfs

* Update build script

* Run find locations task in parallel

This should speed up compile

* Cleanup before close

* Limit workers to avoid hitting memory limit

* Limit pool size

* Skip one more mangling

* Exclude entrypoints from mangling

* Try to fix web build and clean up code

* Exempt a few more projects

* Exempt another file

* Also exempt html

* Skip mangling ext entrypoints

* Use prefix that can't be confused with rpc calls

* Fix max call stack error

* Switch prefixes

* Don't mangle ambient declarations

* Use correct way of checking modifier flags

* Workaround getCombinedModifierFlags not doing what I'd expect

Maybe needs the checker to be enabled too? Just check parent chain instead for now

* Clean up code and add logic showing how enum mangling could work

* Remove a few more skipMangles

Use entrypoints instead

* Fix entrypoint name
This commit is contained in:
Matt Bierner
2023-06-12 23:18:05 -07:00
committed by GitHub
parent 79c4092768
commit debcf16fcd
22 changed files with 1338 additions and 134 deletions
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6
extensions/mangle-loader.js
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@@ -8,12 +8,12 @@ const fs = require('fs');
const webpack = require('webpack');
const fancyLog = require('fancy-log');
const ansiColors = require('ansi-colors');
const { Mangler } = require('../build/lib/mangleTypeScript');
const { Mangler } = require('../build/lib/mangle/index');
/**
* Map of project paths to mangled file contents
*
* @type {Map<string, Map<string, { out: string; sourceMap?: string }>>}
* @type {Map<string, Promise<Map<string, { out: string; sourceMap?: string }>>>}
*/
const mangleMap = new Map();
@@ -55,7 +55,7 @@ module.exports = async function (source, sourceMap, meta) {
const callback = this.async();
const fileContentsMap = getMangledFileContents(options.configFile);
const fileContentsMap = await getMangledFileContents(options.configFile);
const newContents = fileContentsMap.get(this.resourcePath);
callback(null, newContents?.out ?? source, sourceMap, meta);