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perf: improve Bytes::copy_to_bytes #688

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merged 1 commit into from
Apr 10, 2024

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tisonkun
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@tisonkun tisonkun commented Apr 9, 2024

Ref - https://greptime.com/blogs/2024-04-09-rust-protobuf-performance#step-5-why-is-bytes-slice-so-slow

We already use this tech for BytesMut, but not bring it for Bytes. Namely, reduce the overhead of slice.

impl Buf for BytesMut {
    ...
    fn copy_to_bytes(&mut self, len: usize) -> Bytes {
        self.split_to(len).freeze()
    }
}

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tisonkun commented Apr 9, 2024

cc @Darksonn

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@braddunbar braddunbar left a comment

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Nice! Great consolidation.

@tisonkun
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@braddunbar shall we merge this patch? Or it's still wait for further reviews?

@Darksonn Darksonn merged commit b5fbfc3 into tokio-rs:master Apr 10, 2024
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@tisonkun tisonkun deleted the perf-copy-to-bytes-bytes branch April 10, 2024 14:59
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Thank you!

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Thank you for the PR :)

@mox692 mox692 mentioned this pull request Jul 30, 2024
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3 participants