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annotate rust/hg-core/src/operations/dirstate_status.rs @ 46155:fce2f20a54ce

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copies-rust: start recording overwrite as they happens If a revision has information overwriting data from another revision, the overwriting revision is a descendant of the overwritten one. So we could warm the Oracle cache with such information to avoid potential future `is_ancestors` call. This provide us with a large speedup in the most expensive cases: Repo Case Source-Rev Dest-Rev # of revisions old time new time Difference Factor time per rev --------------------------------------------------------------------------------------------------------------------------------------------------------------- mozilla-try x00000_revs_x00000_added_x0000_copies 1b661134e2ca 1ae03d022d6d : 228985 revs, 41.113063 s, 36.001255 s, -5.111808 s, ? 0.8757, 157 ?s/rev mozilla-try x00000_revs_x00000_added_x000_copies 9b2a99adc05e 8e29777b48e6 : 382065 revs, 27.891612 s, 14.340641 s, -13.550971 s, ? 0.5142, 37 ?s/rev Full comparison below: Repo Case Source-Rev Dest-Rev # of revisions old time new time Difference Factor time per rev --------------------------------------------------------------------------------------------------------------------------------------------------------------- mercurial x_revs_x_added_0_copies ad6b123de1c7 39cfcef4f463 : 1 revs, 0.000042 s, 0.000042 s, +0.000000 s, ? 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0.8757, 157 ?s/rev mozilla-try x00000_revs_x00000_added_x000_copies 9b2a99adc05e 8e29777b48e6 : 382065 revs, 27.891612 s, 14.340641 s, -13.550971 s, ? 0.5142, 37 ?s/rev Differential Revision: https://phab.mercurial-scm.org/D9497
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Sat, 21 Nov 2020 17:00:32 +0100
parents fd47483f1645
children 441024b279a6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
45113
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1 // dirstate_status.rs
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2 //
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3 // Copyright 2019, Raphaël Gomès <rgomes@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::dirstate::status::{build_response, Dispatch, HgPathCow, Status};
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9 use crate::matchers::Matcher;
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10 use crate::{DirstateStatus, StatusError};
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11
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12 /// A tuple of the paths that need to be checked in the filelog because it's
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13 /// ambiguous whether they've changed, and the rest of the already dispatched
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14 /// files.
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15 pub type LookupAndStatus<'a> = (Vec<HgPathCow<'a>>, DirstateStatus<'a>);
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16
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17 #[cfg(feature = "dirstate-tree")]
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18 impl<'a, M: Matcher + Sync> Status<'a, M> {
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19 pub(crate) fn run(&self) -> Result<LookupAndStatus<'a>, StatusError> {
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20 let (traversed_sender, traversed_receiver) =
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21 crossbeam_channel::unbounded();
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22
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23 // Step 1: check the files explicitly mentioned by the user
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24 let (work, mut results) = self.walk_explicit(traversed_sender.clone());
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25
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26 // Step 2: Check files in the dirstate
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27 if !self.matcher.is_exact() {
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28 self.extend_from_dmap(&mut results);
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29 }
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30 // Step 3: Check the working directory if listing unknowns
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31 if !work.is_empty() {
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32 // Hashmaps are quite a bit slower to build than vecs, so only
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33 // build it if needed.
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34 let mut old_results = None;
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35
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36 // Step 2: recursively check the working directory for changes if
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37 // needed
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38 for (dir, dispatch) in work {
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39 match dispatch {
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40 Dispatch::Directory { was_file } => {
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41 if was_file {
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42 results.push((dir.to_owned(), Dispatch::Removed));
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43 }
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44 if self.options.list_ignored
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45 || self.options.list_unknown
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46 && !self.dir_ignore(&dir)
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47 {
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48 if old_results.is_none() {
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49 old_results =
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50 Some(results.iter().cloned().collect());
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51 }
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52 self.traverse(
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53 &dir,
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54 old_results
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55 .as_ref()
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56 .expect("old results should exist"),
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57 &mut results,
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58 traversed_sender.clone(),
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59 );
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60 }
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61 }
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62 _ => {
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63 unreachable!("There can only be directories in `work`")
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64 }
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65 }
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66 }
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67 }
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68
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69 drop(traversed_sender);
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70 let traversed = traversed_receiver.into_iter().collect();
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71
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72 Ok(build_response(results, traversed))
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73 }
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74 }
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75
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76 #[cfg(not(feature = "dirstate-tree"))]
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77 impl<'a, M: Matcher + Sync> Status<'a, M> {
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78 pub(crate) fn run(&self) -> Result<LookupAndStatus<'a>, StatusError> {
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79 let (traversed_sender, traversed_receiver) =
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80 crossbeam_channel::unbounded();
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81
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82 // Step 1: check the files explicitly mentioned by the user
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83 let (work, mut results) = self.walk_explicit(traversed_sender.clone());
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84
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85 if !work.is_empty() {
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86 // Hashmaps are quite a bit slower to build than vecs, so only
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87 // build it if needed.
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88 let old_results = results.iter().cloned().collect();
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89
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90 // Step 2: recursively check the working directory for changes if
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91 // needed
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92 for (dir, dispatch) in work {
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93 match dispatch {
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94 Dispatch::Directory { was_file } => {
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95 if was_file {
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96 results.push((dir.to_owned(), Dispatch::Removed));
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97 }
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98 if self.options.list_ignored
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99 || self.options.list_unknown
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100 && !self.dir_ignore(&dir)
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101 {
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102 self.traverse(
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103 &dir,
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104 &old_results,
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105 &mut results,
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106 traversed_sender.clone(),
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107 );
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108 }
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109 }
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110 _ => {
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111 unreachable!("There can only be directories in `work`")
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112 }
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113 }
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114 }
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115 }
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116
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117 if !self.matcher.is_exact() {
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118 if self.options.list_unknown {
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119 self.handle_unknowns(&mut results);
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120 } else {
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121 // TODO this is incorrect, see issue6335
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122 // This requires a fix in both Python and Rust that can happen
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123 // with other pending changes to `status`.
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124 self.extend_from_dmap(&mut results);
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125 }
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126 }
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127
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128 drop(traversed_sender);
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129 let traversed = traversed_receiver.into_iter().collect();
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130
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131 Ok(build_response(results, traversed))
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132 }
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133 }