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annotate rust/hg-core/src/operations/debugdata.rs @ 51106:687e192dae16

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rust-matchers: fix quadratic complexity in `FileMatcher` Concretely, this command: ``` $ echo hg up -r <nodeid>; time hg revert dir1 dir2 -r <othernode> --debug hg up -r <nodeid> real 0m14.690s user 0m14.766s sys 0m5.430s ``` was much slower despite using 16 cores before this change. The approach taken here is the same one used in match.py, in exactmatcher. This changeset was originally written by Valentin Gatien-Baron in a private repository. I have redacted the commit message and did a minor clean up of the code.
author Rapha?l Gom?s <rgomes@octobus.net>
date Wed, 18 Oct 2023 14:50:14 +0200
parents 1928b770e3e7
children 13f58ce70299
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1 // debugdata.rs
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2 //
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3 // Copyright 2020 Antoine Cezar <antoine.cezar@octobus.net>
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4 //
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5 // This software may be used and distributed according to the terms of the
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6 // GNU General Public License version 2 or any later version.
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7
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8 use crate::repo::Repo;
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9 use crate::requirements;
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10 use crate::revlog::{Revlog, RevlogError};
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11
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12 /// Kind of data to debug
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13 #[derive(Debug, Copy, Clone)]
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14 pub enum DebugDataKind {
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15 Changelog,
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16 Manifest,
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17 }
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18
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19 /// Dump the contents data of a revision.
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20 pub fn debug_data(
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21 repo: &Repo,
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22 revset: &str,
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23 kind: DebugDataKind,
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24 ) -> Result<Vec<u8>, RevlogError> {
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25 let index_file = match kind {
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26 DebugDataKind::Changelog => "00changelog.i",
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27 DebugDataKind::Manifest => "00manifest.i",
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28 };
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29 let use_nodemap = repo
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30 .requirements()
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31 .contains(requirements::NODEMAP_REQUIREMENT);
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32 let revlog =
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33 Revlog::open(&repo.store_vfs(), index_file, None, use_nodemap)?;
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34 let rev =
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35 crate::revset::resolve_rev_number_or_hex_prefix(revset, &revlog)?;
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36 let data = revlog.get_rev_data_for_checked_rev(rev)?;
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37 Ok(data.into_owned())
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38 }