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Tracking Issue: Syncify the ESM Loader

nodejs/node#55782·122028·JavaScript·55 天未动·13 条评论·上游最近活跃 ·池内状态:可认领
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上游 issue 正文

The code under [`lib/internal/modules/esm`](https://github.com/nodejs/node/tree/main/lib/internal/modules/esm), a.k.a. the ESM loader, contains many functions that are async. We should refactor as many of these as possible, ideally all of them, to be synchronous. This should improve the performance of evaluating ESM code, bringing it roughly on par with the speed of running CommonJS code. Longer term, once the ESM loader is synchronous and we land the [synchronous module customization hooks](https://github.com/nodejs/loaders/blob/main/doc/design/proposal-synchronous-hooks.md), we could deprecate monkey-patching the CommonJS loader and merge together the CommonJS and ESM loaders, eliminating duplication: https://github.com/nodejs/node/issues/50356. This issue will track our progress syncifying the various files and functions of the ESM loader until we can get as much of it to be as synchronous as possible. ### The files to be updated, all under`lib/internal/modules`: - [ ] `run_main.js`: `asyncRunEntryPointWithESMLoader` - [x] `esm/fetch_module.js`: `fetchWithRedirects` - [x] `esm/fetch_module.js`: `isLocalAddress` - [ ] `esm/hooks.js`: `Hooks` class (the async methods here probably don’t need updating as they will be removed once we migrate to the synchronous customization hooks) - [ ] `esm/hooks.js`: `nextHookFactory` - [ ] `esm/load.js`: `getSource` https://github.com/nodejs/node/pull/57419 - [ ] `esm/load.js`: `defaultLoad` https://github.com/nodejs/node/pull/57419 - [ ] `esm/loader.js`: `ModuleLoader.eval` - [ ] `esm/loader.js`: `ModuleLoader.getModuleJobForImport` - [ ] `esm/loader.js`: `ModuleLoader.loadAndTranslate` - [ ] `esm/loader.js`: `ModuleLoader.import` - [ ] `esm/loader.js`: `ModuleLoader.load` - [ ] `esm/module_job.js`: `ModuleJob._link` - [ ] `esm/module_job.js`: `ModuleJob._instantiate` - [ ] `esm/module_job.js`: `ModuleJob.run` - [ ] `esm/module_job.js`: `ModuleJobSync.run` - [ ] `esm/translators.js`: `wasm` handler, via `translators.set('wasm', .…
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