Mercurial > hg-stable
changeset 51589:6e4c8366c5ce
stream-clone: disable gc for the initial section for the v3 format
The number of small container created turn Python in a gc-frenzy that seriously
impact performance.
This significantly boost performance. The following number comes from a large
private repository using perf::stream-locked-section:
base-line: 35.04 seconds
prev-change: 24.51 seconds (-30%)
prev-change: 20.88 seconds (-40%)
this-change: 14.22 seconds (-60% from baseline; -31% from prev)
| author | Pierre-Yves David <pierre-yves.david@octobus.net> |
|---|---|
| date | Tue, 26 Mar 2024 13:34:05 +0000 |
| parents | 463e63aa547c |
| children | 49faa72b994e |
| files | mercurial/streamclone.py |
| diffstat | 1 files changed, 4 insertions(+), 1 deletions(-) [+] |
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--- a/mercurial/streamclone.py Tue Mar 26 13:32:46 2024 +0000 +++ b/mercurial/streamclone.py Tue Mar 26 13:34:05 2024 +0000 @@ -850,7 +850,10 @@ - ways to adjust the number of expected entries/files ? """ - with repo.lock(): + # Python is getting crazy at all the small container we creates while + # considering the files to preserve, disabling the gc while we do so helps + # performance a lot. + with repo.lock(), util.nogc(): repo.ui.debug(b'scanning\n')