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Re: Cygwin Git Performance






On 5/21/2019 10:34 AM, Nathan and Ila Reynolds wrote:
I am not sure if this is the right mailing list.  If not, please redirect me to the right place.

I have Cygwin's git (2.21.0) and Git for Windows (2.21.0) installed on my Windows 10 machine.  I run the following command with each binary "git push --all" on a simple 2 line change to 1 file.  If I use Cygwin's git, then the operation takes almost 5 minutes.  If I use Git for Windows, then the operation takes almost 20 seconds.  I tried using --verbose to figure out why Cygwin's git is so slow but it does not reveal anything to me as to why.  What can I do to figure out why Cygwin's git is so slow? I am hoping that we can get to the bottom of this and it can be fixed to help all users.



You might try turning on GIT_TRACE_PERFORMANCE [1] and see if that
shows any differences.

If you can install 2.22.0-rc* versions of both, you can turn on
GIT_TR2_PERF [2] and some additional details.

If your repo is very large, it may be due to some Windows file system
optimizations present in the Git for Windows version.

[1] https://git-scm.com/book/en/v2/Git-Internals-Environment-Variables
[2] https://github.com/git/git/blob/master/Documentation/technical/api-trace2.txt#L80


Hope that helps,
Jeff