cherry-pick very slow on big repository
- Date: Fri, 10 Nov 2017 10:39:39 +0100 (CET)
- From: Peter Krefting <peter@xxxxxxxxxxxxxxxx>
- Subject: cherry-pick very slow on big repository
On a big repository (57000 files, 2,5 gigabytes in .git/objects), git
cherry-pick is very slow for me (v2.15.0). This is cherry-picking a
one-file change, where the file is in the same place on both branches,
and which applies cleanly (I am backporting a few fixes to a
$ time git cherry-pick -x 717eb328940ca2e33f14ed27576e656327854b7b
[redacted 391454f16d] Redacted
Author: Redacted <redacted>
Date: Mon Oct 16 15:58:05 2017 +0200
1 file changed, 2 insertions(+), 2 deletions(-)
Something is not how it should be here. The repo shares objects
(.git/objects/info/alternates) with another repository (I have run
"git gc" on both repositories).
Running strace, it seems like it is doing lstat(), open(), mmap(),
close() and munmap() on every single file in the repository, which
takes a lot of time.
I thought it was just updating the status, but "git status" returns
immediately, while cherry-picking takes several minutes for every
cherry-pick I do.
\\// Peter - http://www.softwolves.pp.se/