Turbopack: require(/* turbopackChunkingType: parallel */#91278
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Turbopack: require(/* turbopackChunkingType: parallel */#91278
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Merging this PR will not alter performance
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This was referenced Mar 12, 2026
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There appears to be a perf regression indeed
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lukesandberg
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#91347) The JS analyze microbenchmark got 23% faster: Only a tiny fraction of imports have annotations, be it `import ... with {...}` or `require(/*webpackIgnore: true*/...)`, so a `Option<Pointer<Struct>>` mkes sense here. ``` canary: references/jsonwebtoken.js/full time: [63.250 ms 63.918 ms 64.752 ms] change: [-5.2380% -3.0074% -0.8753%] (p = 0.01 < 0.05) Change within noise threshold. Found 12 outliers among 100 measurements (12.00%) 5 (5.00%) high mild 7 (7.00%) high severe now: references/jsonwebtoken.js/full time: [49.070 ms 49.166 ms 49.273 ms] change: [-24.097% -23.079% -22.237%] (p = 0.00 < 0.05) Performance has improved. Found 6 outliers among 100 measurements (6.00%) 3 (3.00%) high mild 3 (3.00%) high severe ```` This came up in #91278 (comment), which added another (tiny) field to ImportAttributes. But it caused a 6% regression in the microbenchmark anyway.
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import ... with {"turbopack-chunking-type: "parallel"sharedas a chunking type