Re: git pull takes ~8 seconds on up-to-date Linux git tree

Jeff King [off-list ref] writes:

On Thu, Oct 04, 2012 at 04:14:54PM +0200, Markus Trippelsdorf wrote:

quoted

with current trunk I get the following on an up-to-date Linux tree:

markus@x4 linux % time git pull
Already up-to-date.
git pull  7.84s user 0.26s system 92% cpu 8.743 total

git version 1.7.12 is much quicker:

markus@x4 linux % time git pull
Already up-to-date.
git pull  0.10s user 0.02s system 16% cpu 0.740 total

Yikes. I can easily reproduce here. Bisecting between master and
v1.7.12 gives a curious result: the slowdown first occurs with the merge
commit 34f5130 (Merge branch 'jc/merge-bases', 2012-09-11). But neither
of its parents is slow. I don't see anything obviously suspect in the
merge, though.

Thanks; we probably should revert the merge before the final and
handle the fallout later, unless we know why the integrated whole is
slower than its parts.