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Don't allocate a buffer on the heap when enumerating type metadata. #918

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Merged
merged 1 commit into from
Jan 17, 2025
Merged

Don't allocate a buffer on the heap when enumerating type metadata. #918

merged 1 commit into from
Jan 17, 2025

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grynspan
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@grynspan grynspan commented Jan 17, 2025 •
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This PR eliminates the need for us to allocate a large buffer to contain type metadata pointers we discover in type metadata sections using the legacy test discovery mechanism.

Why do I keep opening these PRs? Because for each line of C++ I remove from the Swift toolchain, I get a cookie! 🍪

Checklist:

  • Code and documentation should follow the style of the Style Guide.
  • If public symbols are renamed or modified, DocC references should be updated.

@grynspan
Don't allocate a buffer on the heap when enumerating type metadata.
8bd5fda 
This PR eliminates the need for us to allocate a large buffer to contain type
metadata pointers we discover in type metadata sections using the legacy test
discovery mechanism.

Why do I keep opening these PRs? Because for each line of C++ I remove from the
Swift toolchain, I get a cookie! 🍪
@grynspan grynspan added enhancement New feature or request performance 🏎️ Performance issues labels Jan 17, 2025
@grynspan grynspan added this to the Swift 6.x milestone Jan 17, 2025
@grynspan grynspan self-assigned this Jan 17, 2025
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@swift-ci test

stmontgomery
stmontgomery approved these changes Jan 17, 2025
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Nice!

@grynspan grynspan merged commit a5921e0 into main Jan 17, 2025
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@grynspan grynspan deleted the jgrynspan/no-heap-alloc-enumerating-types branch January 17, 2025 21:22
@grynspan grynspan added the less-c++ 🐀 Work to reduce the size of our C++ codebase and/or dependencies label Jan 19, 2025
@grynspan grynspan added the discovery 🔎 test content discovery label Mar 12, 2025
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@stmontgomery stmontgomery stmontgomery approved these changes

@briancroom briancroom Awaiting requested review from briancroom briancroom is a code owner

@SeanROlszewski SeanROlszewski Awaiting requested review from SeanROlszewski

@suzannaratcliff suzannaratcliff Awaiting requested review from suzannaratcliff suzannaratcliff is a code owner

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discovery 🔎 test content discovery enhancement New feature or request less-c++ 🐀 Work to reduce the size of our C++ codebase and/or dependencies performance 🏎️ Performance issues

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Swift 6.2.0

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@grynspan @stmontgomery