very slow pull request checkout
Here is an example of extremely slow pull request handling https://ci.appveyor.com/project/RasmusJohansson/server/builds/51895276.
From the log
[00:00:00] Build started
[00:00:00] git clone -q --depth=1 https://github.com/MariaDB/server.git C:\projects\server
[00:00:28] git fetch -q origin +refs/pull/3976/merge:
[00:06:41] git checkout -qf FETCH_HEAD
"git fetch" takes 6.5 minutes, roughly. That's too much
Some details:
- the repo is huge, 25 years of commit history (first in BitKeeper, then converted to Bazaar for a while, then converted to Git)
- this pull request is not done against "default" branch 'main', but against older '10.6'. Pull requests against main are much faster
- normal branch builds, against older branches are fast, as compared to PRs, clone_depth is 1
So the question is how to speedup builds of PR older branches
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Support Staff 1 Posted by Feodor Fitsner on 16 Apr, 2025 07:22 PM
VM state is not preserved between builds, so entire clone will happen with every build.
If you know there is a better git command to make it faster you can configure your own "clone_script" (maybe for specific branch only). For the start, you can try using "clone repo as a zip archive" though it won't allow you running any tools relying on git repo.