Mercurial > hg
annotate .editorconfig @ 47120:7109a38830c9
dirstate-tree: Fold "tracked descendants" counter update in main walk
For the purpose of implementing `has_tracked_dir` (which means "has tracked
descendants) without an expensive sub-tree traversal, we maintaing a counter
of tracked descendants on each "directory" node of the tree-shaped dirstate.
Before this changeset, mutating or inserting a node at a given path would
involve:
* Walking the tree from root through ancestors to find the node or the spot
where to insert it
* Looking at the previous node if any to decide what counter update is needed
* Performing any node mutation
* Walking the tree *again* to update counters in ancestor nodes
When profiling `hg status` on a large repo, this second walk takes times
while loading a the dirstate from disk.
It turns out we have enough information to decide before he first tree walk
what counter update is needed. This changeset merges the two walks, gaining
~10% of the total time for `hg update` (in the same hyperfine benchmark as
the previous changeset).
---
Profiling was done by compiling with this `.cargo/config`:
[profile.release]
debug = true
then running with:
py-spy record -r 500 -n -o /tmp/hg.json --format speedscope -- \
./hg status -R $REPO --config experimental.dirstate-tree.in-memory=1
then visualizing the recorded JSON file in https://www.speedscope.app/
Differential Revision: https://phab.mercurial-scm.org/D10554
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Fri, 30 Apr 2021 14:22:14 +0200 |
parents | c25efc468a49 |
children |
rev | line source |
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28793 | 1 # See http://EditorConfig.org for the specification |
2 | |
3 root = true | |
4 | |
5 [*.py] | |
6 indent_size = 4 | |
7 indent_style = space | |
8 trim_trailing_whitespace = true | |
45392
c25efc468a49
mercurial: force LF endings for *.py, *.{c,h} and *.t in .editorconfig
Matt Harbison <matt_harbison@yahoo.com>
parents:
38281
diff
changeset
|
9 end_of_line = lf |
28793 | 10 |
11 [*.{c,h}] | |
12 indent_size = 8 | |
13 indent_style = tab | |
14 trim_trailing_whitespace = true | |
45392
c25efc468a49
mercurial: force LF endings for *.py, *.{c,h} and *.t in .editorconfig
Matt Harbison <matt_harbison@yahoo.com>
parents:
38281
diff
changeset
|
15 end_of_line = lf |
38281
1d6066336d7b
mercurial: add .t files to .editorconfig
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28793
diff
changeset
|
16 |
1d6066336d7b
mercurial: add .t files to .editorconfig
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28793
diff
changeset
|
17 [*.t] |
1d6066336d7b
mercurial: add .t files to .editorconfig
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28793
diff
changeset
|
18 indent_size = 2 |
1d6066336d7b
mercurial: add .t files to .editorconfig
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28793
diff
changeset
|
19 indent_style = space |
1d6066336d7b
mercurial: add .t files to .editorconfig
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28793
diff
changeset
|
20 trim_trailing_whitespace = false |
45392
c25efc468a49
mercurial: force LF endings for *.py, *.{c,h} and *.t in .editorconfig
Matt Harbison <matt_harbison@yahoo.com>
parents:
38281
diff
changeset
|
21 end_of_line = lf |