On Tue, Jun 09, 2015 at 08:46:24PM -0700, Shawn Pearce wrote:
This patch introduces a quick flag to has_sha1_file which
callers can use when they would prefer high performance at
the cost of false negatives during repacks. There may be
other code paths that can use this, but the
On Wed, Jun 10, 2015 at 9:00 PM, Jeff King p...@peff.net wrote:
On Tue, Jun 09, 2015 at 08:46:24PM -0700, Shawn Pearce wrote:
This patch introduces a quick flag to has_sha1_file which
callers can use when they would prefer high performance at
the cost of false negatives during repacks.
On Wed, Jun 10, 2015 at 7:00 AM, Jeff King p...@peff.net wrote:
On Tue, Jun 09, 2015 at 08:46:24PM -0700, Shawn Pearce wrote:
This patch introduces a quick flag to has_sha1_file which
callers can use when they would prefer high performance at
the cost of false negatives during repacks.
On Tue, Jun 09, 2015 at 01:24:36PM -0400, Jeff King wrote:
I tested this on my system, and confirmed that for a git clone
--no-local --bare git.git:
1. It cuts the number of openat/getdents/close syscalls by several
orders of magnitude.
2. The overall time drops from ~11.4s to
On Fri, Jun 05, 2015 at 08:29:21AM -0400, Jeff King wrote:
On Fri, Jun 05, 2015 at 08:18:17AM -0400, Jeff King wrote:
1. Devise some torture to tests to see whether my patch series is in
fact racy on Linux.
2. Assuming it is, scrap it and make a has_sha1_file_quick() which
On Fri, Jun 5, 2015 at 5:29 AM, Jeff King p...@peff.net wrote:
However, some code paths make a large number of
has_sha1_file checks which are _not_ expected to return 1.
The collision test in index-pack.c is such a case. On a
local system, this can cause a performance slowdown of
around 5%.
not fix your problem. ;)
Please test and confirm that it makes things better on your system.
-- 8 --
Subject: [PATCH] index-pack: avoid excessive re-reading of pack directory
Since 45e8a74 (has_sha1_file: re-check pack directory before
giving up, 2013-08-30), we spend extra effort for
has_sha1_file
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