Revert #148937 #150096
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Revert #148937 #150096
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…owedBuf` and `BorrowedCursor`) This caused several performance regressions because of existing code which uses `Read::read` and therefore requires full buffer initialization. This is particularly a problem when the same buffer is re-used for multiple read calls since this means it needs to be fully re-initialized each time. There is still some benefit to landing the API changes, but we will have to add private APIs so that the existing infrastructure can track and avoid redundant initialization.
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r? @ChrisDenton r=me when PR CI passes |
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@bors r+ |
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…sDenton Revert rust-lang#148937 rust-lang#148937: Remove initialized-bytes tracking from `BorrowedBuf` and `BorrowedCursor` This caused several performance regressions because of existing code which uses `Read::read` and therefore requires full buffer initialization. This is particularly a problem when the same buffer is re-used for multiple read calls since this means it needs to be fully re-initialized each time. There is still some benefit to landing the API changes, but we will have to add private APIs so that the existing infrastructure can track and avoid redundant initialization.
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Rollup of 4 pull requests Successful merges: - #149919 (Correctly encode doc attribute metadata) - #150051 (mir_build: Rename `TestCase` to `TestableCase`) - #150088 (miri: add `miri_spin_loop` to make `hint::spin_loop` work consistently) - #150096 (Revert #148937) r? `@ghost` `@rustbot` modify labels: rollup
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👍 for landing this. I'll work on an updated version that does |
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Rollup merge of #150096 - Amanieu:revert-borrowedbuf, r=ChrisDenton Revert #148937 #148937: Remove initialized-bytes tracking from `BorrowedBuf` and `BorrowedCursor` This caused several performance regressions because of existing code which uses `Read::read` and therefore requires full buffer initialization. This is particularly a problem when the same buffer is re-used for multiple read calls since this means it needs to be fully re-initialized each time. There is still some benefit to landing the API changes, but we will have to add private APIs so that the existing infrastructure can track and avoid redundant initialization.
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Rollup of 4 pull requests Successful merges: - rust-lang/rust#149919 (Correctly encode doc attribute metadata) - rust-lang/rust#150051 (mir_build: Rename `TestCase` to `TestableCase`) - rust-lang/rust#150088 (miri: add `miri_spin_loop` to make `hint::spin_loop` work consistently) - rust-lang/rust#150096 (Revert rust-lang/rust#148937) r? `@ghost` `@rustbot` modify labels: rollup
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#148937: Remove initialized-bytes tracking from
BorrowedBufandBorrowedCursorThis caused several performance regressions because of existing code which uses
Read::readand therefore requires full buffer initialization. This is particularly a problem when the same buffer is re-used for multiple read calls since this means it needs to be fully re-initialized each time.There is still some benefit to landing the API changes, but we will have to add private APIs so that the existing infrastructure can track and avoid redundant initialization.