Mara 60138110d7 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		2021-03-05 10:57:17 +01:00
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benches
src	Rollup merge of #81136 - Xavientois:io_reader_size_hint, r=cramertj	2021-03-05 10:57:17 +01:00
tests
build.rs
Cargo.toml	Bump minimum libc version to 0.2.85 for std.	2021-02-24 12:47:28 +01:00