DeclarationTable allocation reductions#81627
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ToddGrun merged 6 commits intodotnet:mainfrom Dec 17, 2025
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…ithub.com/ToddGrun/roslyn into dev/toddgrun/DeclarationTable_Allocations
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Finally got perf results back, and this looked promising. Elevating out of draft status and this is ready for review. |
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@dotnet/roslyn-compiler -- ptal |
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@dotnet/roslyn-compiler For a second review |
CyrusNajmabadi
approved these changes
Dec 16, 2025
This was referenced Dec 18, 2025
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Make and use a builder for DeclarationTable edits to reduce allocations from creating intermediary DeclarationTable and repeated modifications to an underlying ImmutableDictionary.
Insertion PR: https://devdiv.visualstudio.com/DevDiv/_git/VS/pullrequest/695154
PIT results:
Allocations in VS under SyntaxAndDeclarationManager.CreateState from ScrollingAndTyping test, Typing scenario:
*** Before ***
*** After ***
