On 7/27/2018 11:42 AM, Duy Nguyen wrote:
On Thu, Jul 26, 2018 at 12:40:05PM -0700, Junio C Hamano wrote:
Duy Nguyen <pclouds@xxxxxxxxx> writes:
I'm excited so I decided to try out anyway. This is what I've come up
with. Switching trees on git.git shows it could skip plenty entries,
so promising. It's ugly and it fails at t6020 though, there's still
work ahead. But I think it'll stop here.
We are extremely shallow compared to projects like the kernel and
stuff from java land, so that is quite an interesting find.
Yeah. I've got a more or less complete patch now with full test suite
passed and even with linux.git, the numbers look pretty good.
Ben, is it possible for you to try this one out? I don't suppose it
will be that good on a real big repo. But I'm curious how much faster
could this patch does.
Thanks Duy. I'm super excited about this so did a quick and dirty
manual perf test.
I ran "git checkout" 5 times, discarded the first 2 runs and averaged
the last 3 with and without this patch on top of VFSForGit in a large repo.
Without this patch average times were 16.97
With this patch average times were 10.55
That is a significant improvement!
I really have to run but I'll be back next week to dig in more.
Ben
