[NFC] Optimize ModuleUtils type-scanning code#8572
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kripken merged 2 commits intoWebAssembly:mainfrom Apr 7, 2026
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tlively
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Apr 6, 2026
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Before, we always did a loop on
type.getHeapTypeChildren()whichmeans setting up a scanner object and going through a generic
path. Instead, handle the common cases directly. This avoids any
generic path in the common case.
This makes us 1% faster on
-O3, as measured by instructioncount, number of branches, and walltime. The noise in the first
two is incredibly small, so this looks reliably faster.