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Some performance related changes#16566

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odersky merged 28 commits intoscala:mainscala/scala3:mainfrom

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Jan 20, 2023

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Commits on Jan 20, 2023

• Better benchmark and Stats infrastructure

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• Reduce allocations for pickling

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• Reduce context creations for value class related ops

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• Refactor context pools

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• Avoid creation of Type lists when assigning types to Apply nodes

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• Pickling reorganizations

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• Reduce string computations

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• Avoid recomputing hot requiredMethods

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• Don't have Diagnostic inherit from Exception

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• Reuse regex matcher in replaceAll calls

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• Add specialized versions of tasty.Util.dble for common array element types

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• Allow to reuse table of a util.{MutableHashSet,MutableHashMap}

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• Avoid some Some wrappers when accessing maps

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• Avoid unnecessary uses of `parentSyms`

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• Avoid some boxings of vars

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• Avoid creating large CharBuffers in LookaheadScanners

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• Avoid expensive settings lookup in `setDenot`

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• Make `validFor` monomorphic

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• Cache `isType` in SymDenotations

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• Streamline some hot compuations

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• Inline rollbackGadtUnless in GadtConstraint

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• Replace tpd.mapInline by flattenMapConserve

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• Optimize period equality tests

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• Drop expensive escapeToNext

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• Use home-brewed futures for parallel pickling

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• Drop redundant catch and re-throw

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• Revert some changes in NameBuffer

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• Make lazy vals threadunsafe.

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