Re: Is there a scriptable way to update the stat-info in the index without having git open and read those files?

Elijah Newren [off-list ref] writes:

A little more detail, for the curious: I have a script that is, among
other things, renaming large numbers of files.  Calling 'git mv <old>
<new>' on each pair took forever.  So I switched to manually renaming
the files in the working copy myself, and using git update-index
--index-info to do the renames in the index.  The result was _much_
faster, but of course that method blows away all the stat information
for the relevant files and causes any subsequent git operation (after
my script is done) to be slow.  I inserted a 'git update-index -q
--refresh' at the end of my script to fix that, but that is much
slower than I want since it has to re-read all the affected files to
ensure they haven't been modified (however, it isn't as slow as
forking many git-mv processes).  I've tried to look for a way to speed
up this update, but haven't found one.

Sounds like a one-off thing to me, and I personally do not think it is
worth the effort to add something even riskier than assume-unchanged to
solve.