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Look at HeapObject for ARC statistics and don't register releases of immortal objects #189

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hassila opened this issue Sep 14, 2023 · 0 comments

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hassila commented Sep 14, 2023 •

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As we otherwise get more releases than retains and stats look imbalanced.

Hint:
swift_release is called for the immutable empty array instance:

https://godbolt.org/z/qEfKvshP1

I think you don't need to look at the reference count (RC) but the immortal flags are next to the RC which may be in the side table:
https://github.com/apple/swift/blob/ebf46eac2322d2e7085beef4eb4bf1125404c3c9/stdlib/public/SwiftShims/swift/shims/RefCount.h#L82-L84 (edited)

dnadoba mentioned this issue

Our perf thresholds have changed apple/swift-certificates#178

Merged

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