I recently found myself undergoing an epic journey to speed up our CICD builds at work. After some initial digging, I found that our git clone operations were taking 3 minutes and pulling 2gb of data, just to test a tiny Golang binary (3,500 LoC, 20mb).
With some easy tweaks, I was able to reduce our clone time to 5 seconds and only pull 35mb of data.
Faster Git clones
*Requires a modern version of git (v2.25+) with sparse-checkout support.
# clone our repo. Note the blob filter and --no-checkout git clone --no-checkout --filter=blob:none ssh://firstname.lastname@example.org:22/monorepo.git # Pop into the folder. If you ls, there is only the .git/ foldere cd monorepo ## Set up our sparse checkout git sparse-checkout init --cone # Specify the paths we care about git sparse-checkout set /your_path/ /some/other/path # Pull the files. git read-tree -mu HEAD
I found these three links very helpful in my research: