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Cache mapper instantiations#61505

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Andarist wants to merge 13 commits intomicrosoft:mainmicrosoft/TypeScript:mainfrom

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Commits on Mar 29, 2025

• Cache instantiated object alias type arguments on mapper

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  e337be1

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• Move the cache to `instantiateTypeWithAlias`

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  cb3b721

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• disable cache on function mappers

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  6d4258b

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• tweak cache key

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Commits on Mar 30, 2025

• add sanity checks

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Commits on Apr 1, 2025

• only disable cache on certain `makeFunctionTypeMapper`s

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  b0f5c70

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• fmt

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• fix an instance of reusing bad cached value

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  a040139

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Commits on Apr 4, 2025

• relax `restrictiveMapper` caching restriction

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• replace `voidMap` with `emptyMap`

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• fmt

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Commits on Apr 5, 2025

• Cache repeated mapper instantiations only within a single instantiation call

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Commits on May 2, 2025

• clear caches after each inference

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