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authorRoman Bataev <roman@bataev.me>2023-08-06 16:40:23 -0400
committerRoman Bataev <roman@bataev.me>2023-08-21 22:30:00 -0400
commitc5b2e50b8907555538f52356fc04b2a5820b5c6f (patch)
tree41e9e9b9a0c231f2c86819804b0b6d9bc16823fb /plumbing/object/commit_walker_bfs.go
parentcd6170c6f808453f58dcfd15c6c59345e3df402b (diff)
downloadgo-git-c5b2e50b8907555538f52356fc04b2a5820b5c6f.tar.gz
utils: filesystem, Calculate filesystem node's hash lazily.
The main motivation behind this change is to speed up status operation. Currently it's very slow, especially for repositories with lots of ignored files (e.g. node.js repository with node_modules directory). One of the reasons for this slowness is the fact that traversing filesystem involves calculating file hashes for all files, even if those hashes are not needed in the end because the files are in gitignore. On my machine, for a random repository with sizable (ignored) node_modules directory this changes bring the execution time for Worktree.Status from ~3.5s to ~1.4s. This is still very slow, but a significant improvement. A better fix (instead of or in addition to this one) would be to avoid traversing ignored files in the first place. However, such change seem to be more intrusive and will require much deeper understanding of the codebase.
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