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[v18.x] backport startup performance patches #46425

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[v18.x] backport startup performance patches #46425

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10f5974
bootstrap: lazy-load Performance.prototype.timeOrigin
joyeecheung Jan 30, 2023
3076119
test: use an array for WPT gloablThis initialization scripts
joyeecheung Jan 30, 2023
9960b3d
bootstrap: lazy load non-essential modules
joyeecheung Dec 9, 2022
a73d729
bootstrap: support module_wrap binding in snapshot
joyeecheung Dec 13, 2022
1892b8d
bootstrap: include event_target into the built-in snapshot
joyeecheung Dec 13, 2022
4a6a473
modules: move modules/cjs/helpers.js to modules/helpers.js
joyeecheung Dec 13, 2022
92c4600
lib: add getLazy() method to internal/util
joyeecheung Dec 13, 2022
9a9a5b5
lib: lazy-load deps in source_map_cache.js
joyeecheung Dec 13, 2022
ce5f49e
lib: lazy-load deps in modules/run_main.js
joyeecheung Dec 13, 2022
9ea0ae4
modules: move callbacks and conditions into modules/esm/utils.js
joyeecheung Dec 13, 2022
5060fd2
bootstrap: make CJS loader snapshotable
joyeecheung Dec 13, 2022
6c1abed
bootstrap: optimize modules loaded in the built-in snapshot
joyeecheung Dec 13, 2022
bfa6a2e
deps: V8: cherry-pick d69c7937c99d
targos Nov 8, 2023
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test: use an array for WPT gloablThis initialization scripts 
So that we can add multiple initialization scripts in the test runner.

Refs: #44483
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@joyeecheung @targos
joyeecheung authored and targos committed Oct 28, 2023
commit 3076119c190b4cd6a9aca8a4a53f81374a49c840
19 changes: 10 additions & 9 deletions test/common/wpt.js
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Original file line number Diff line number Diff line change
Expand Up @@ -408,7 +408,7 @@ class WPTRunner {
this.resource = new ResourceLoader(path);

this.flags = [];
this.dummyGlobalThisScript = null;
this.globalThisInitScripts = [];
this.initScript = null;

this.status = new StatusLoader(path);
Expand Down Expand Up @@ -463,17 +463,17 @@ class WPTRunner {
initScript = `${initScript}\n\n//===\nglobalThis.location.search = "${locationSearchString}";`;
}

if (initScript === null && this.dummyGlobalThisScript === null) {
return null;
if (this.globalThisInitScripts.length === null) {
return initScript;
}

const globalThisInitScript = this.globalThisInitScripts.join('\n\n//===\n');

if (initScript === null) {
return this.dummyGlobalThisScript;
} else if (this.dummyGlobalThisScript === null) {
return initScript;
return globalThisInitScript;
}

return `${this.dummyGlobalThisScript}\n\n//===\n${initScript}`;
return `${globalThisInitScript}\n\n//===\n${initScript}`;
}

/**
Expand All @@ -484,8 +484,9 @@ class WPTRunner {
pretendGlobalThisAs(name) {
switch (name) {
case 'Window': {
this.dummyGlobalThisScript =
'global.Window = Object.getPrototypeOf(globalThis).constructor;';
this.globalThisInitScripts.push(
`global.Window = Object.getPrototypeOf(globalThis).constructor;
self.GLOBAL.isWorker = () => false;`);
break;
}

Expand Down