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feat(tvix/store): bump fastcdc, use v2020 version

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This switches away from the less canonical "ronomon" version to the
implementation as described in the
[paper](https://ieeexplore.ieee.org/document/9055082) by Wen Xia, et
al., in 2020.

That version uses 64-bit hash values and tends to be faster than both
the ronomon and v2016 versions, and produces the same chunking as the
2016 version.

As per https://docs.rs/fastcdc/latest/fastcdc/#implementations-1, it's
the recommended choice.

The crate also gained support for streaming version of chunkers:
https://docs.rs/fastcdc/latest/fastcdc/#large-data, which might be
useful.

Change-Id: Ieabec3da54eb2b73c045cb54e51f7a216f63641e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8134
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI
This commit is contained in:
Florian Klink 2023-02-17 18:15:21 +01:00 • committed by flokli
parent fbabcf0420
commit a40d2dcdcd
4 changed files with 6 additions and 6 deletions
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tvix/Cargo.nix
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@ -1915,9 +1915,9 @@ rec {
};
"fastcdc" = rec {
crateName = "fastcdc";
version = "2.0.0";
version = "3.0.0";
edition = "2018";
sha256 = "1cbjm24yq0rpykb0lp4s5w4hvixj0k3m10w95sncd62h784ax4w0";
sha256 = "1qi398l32355b9kh0qr57rin86cv2z8kga25h1yis1wab9cjcxy4";
authors = [
"Nathan Fiedler <nathanfiedler@fastmail.fm>"
];