http://www.perlmonks.org?node_id=926547


in reply to Re: Re-Creating a file does not change inode modification time (Windows)
in thread Re-Creating a file does not change inode modification time (Windows)

Usually it's access time/atime that gets disabled, not mtime. Access might be read-only, so updating atime introduces write i/o to the FS. Modifications are by definition write i/o, so it's cost effective to update mtime also.

--Dave