Even if rename detection is enabled, git will only try to identify renames if it wouldn't take too much time (since IIRC it's a O(#files^2) operation).
Thus, there's a config "diff.renameLimit" and "merge.renameLimit" that tells git to only detect renames if less than N files are affected.
I have personally been burned by this before, and there usually is a default value set in most git clients.
Thus, there's a config "diff.renameLimit" and "merge.renameLimit" that tells git to only detect renames if less than N files are affected.
I have personally been burned by this before, and there usually is a default value set in most git clients.
See also some discussion at https://stackoverflow.com/a/7831027/1237375 .