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| author | Mara <m-ou.se@m-ou.se> | 2021-03-05 10:57:17 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-03-05 10:57:17 +0100 |
| commit | 60138110d7b00c8c788526cad525942e732db6ca (patch) | |
| tree | bf0ee3d1f4fe6994b62a6298b5cbed5f7c04caad /src/test/codegen/src-hash-algorithm/src-hash-algorithm-md5.rs | |
| parent | ec2619ca6219a74f3c97ac7c32aeecd79368788f (diff) | |
| parent | 7674ae1a4e10ab6bafbda57f9fc2175fdf012f5e (diff) | |
| download | rust-60138110d7b00c8c788526cad525942e732db6ca.tar.gz rust-60138110d7b00c8c788526cad525942e732db6ca.zip | |
Rollup merge of #81136 - Xavientois:io_reader_size_hint, r=cramertj
Improved IO Bytes Size Hint After trying to implement better `size_hint()` return values for `File` in [this PR](https://github.com/rust-lang/rust/pull/81044) and changing to implementing it for `BufReader` in [this PR](https://github.com/rust-lang/rust/pull/81052), I have arrived at this implementation that provides tighter bounds for the `Bytes` iterator of various readers including `BufReader`, `Empty`, and `Chain`. Unfortunately, for `BufReader`, the size_hint only improves after calling `fill_buffer` due to it using the contents of the buffer for the hint. Nevertheless, the the tighter bounds should result in better pre-allocation of space to handle the contents of the `Bytes` iterator. Closes #81052
Diffstat (limited to 'src/test/codegen/src-hash-algorithm/src-hash-algorithm-md5.rs')
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