Support parallel bundle imports in libraries#9156
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devongovett
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Jul 26, 2023
| for (let b of this.bundleGraph.getReferencedBundles(this.bundle)) { | ||
| let entry = b.getMainEntry(); | ||
| let symbols = new Map(); | ||
| if (entry && !this.isAsyncBundle && entry.type === 'js') { |
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for now async bundles in libraries are still referenced with parcelRequire. Changing that would require additional changes to the runtimes, but we could fix it eventually.
Benchmark ResultsKitchen Sink ✅
Timings
Cold Bundles
Cached BundlesNo bundle changes detected. React HackerNews ✅
Timings
Cold Bundles
Cached Bundles
AtlasKit Editor ✅
Timings
Cold Bundles
Cached Bundles
Three.js ✅
Timings
Cold BundlesNo bundle changes detected. Cached BundlesNo bundle changes detected. |
AGawrys
reviewed
Jul 26, 2023
| */ | ||
| let bundleGroupRootAsset = nullthrows(bundleGroup.mainEntryAsset); | ||
| if ( | ||
| parentAsset.type !== childAsset.type && |
AGawrys
approved these changes
Aug 1, 2023
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The scope hoisting packager makes some assumptions about how to access code in other bundles that don't hold in library builds. One of these is that it tries to use
parcelRequireto access dependencies in other bundles rather than usingimportorrequire. This PR keeps track of assets in referenced bundles and generates code to access them via the appropriate module system instead.Right now this is only possible with a custom plugin that makes dependencies parallel. There was also a small bug in the bundler preventing that from working correctly (it used to merge them all into a single bundle like type changes). Eventually we might have a separate bundler for libraries that outputs a single asset per bundle, and the packager changes in this PR should also help with that.