Simplify SimpleIdentityMap/Set - #26713
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SolalPirelli
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August 11, 2026 06:29
SolalPirelli
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SimpleIdentityMap/SetSimpleIdentityMap/Set
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There have been a number of experiments recently around data structures in the compiler.
One learning is that megamorphic dispatch can make the "more efficient subclasses" pattern perform worse than having a single general-purpose structure.
Benchmarks seem mostly better on small inputs, unchanged on large ones.
Have you relied on LLM-based tools in this contribution?
No
How was the solution tested?
Covered by existing tests (this is a refactoring)