From: git@jeffhostetler.com
To: git@vger.kernel.org
Cc: gitster@pobox.com, peff@peff.net,
Jeff Hostetler <jeffhost@microsoft.com>
Subject: [PATCH v5 0/4] read-cache: speed up add_index_entry
Date: Wed, 5 Apr 2017 17:38:05 +0000 [thread overview]
Message-ID: <20170405173809.3098-1-git@jeffhostetler.com> (raw)
From: Jeff Hostetler <jeffhost@microsoft.com>
[This is labeled as version 5 because of a cut-n-paste
accident where my first version of this patch was labeled
version 4.]
This version adds more perf tests to p0004-read-tree.sh
================
Teach add_index_entry_with_check() and has_dir_name()
to avoid index lookups if the given path sorts after
the last entry in the index.
This saves at least 2 binary searches per entry.
This improves performance during checkout and read-tree because
merge_working_tree() and unpack_trees() processes a list of already
sorted entries.
This helps performance on very large repositories.
================
Before and after numbers on index with 1M files
./p0004-read-tree.sh
0004.2: read-tree work1 (1003037) 3.21(2.54+0.62)
0004.3: switch base work1 (3038 1003037) 7.49(5.39+1.84)
0004.5: switch work1 work2 (1003037) 11.91(8.38+3.00)
0004.6: switch commit aliases (1003037) 12.22(8.30+3.06)
./p0004-read-tree.sh
0004.2: read-tree work1 (1003040) 2.40(1.65+0.73)
0004.3: switch base work1 (3041 1003040) 6.07(4.12+1.66)
0004.5: switch work1 work2 (1003040) 10.23(6.76+2.92)
0004.6: switch commit aliases (1003040) 10.53(6.97+2.83)
================
Jeff Hostetler (4):
p0004-read-tree: perf test to time read-tree
read-cache: add strcmp_offset function
test-strcmp-offset: created test for strcmp_offset
read-cache: speed up add_index_entry during checkout
Makefile | 1 +
cache.h | 1 +
read-cache.c | 73 +++++++++++++++++++++++++-
t/helper/.gitignore | 1 +
t/helper/test-strcmp-offset.c | 64 +++++++++++++++++++++++
t/perf/p0004-read-tree.sh | 116 ++++++++++++++++++++++++++++++++++++++++++
t/t0065-strcmp-offset.sh | 11 ++++
7 files changed, 266 insertions(+), 1 deletion(-)
create mode 100644 t/helper/test-strcmp-offset.c
create mode 100755 t/perf/p0004-read-tree.sh
create mode 100755 t/t0065-strcmp-offset.sh
--
2.9.3
next reply other threads:[~2017-04-05 17:39 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-05 17:38 git [this message]
2017-04-05 17:38 ` [PATCH v5 1/4] p0004-read-tree: perf test to time read-tree git
2017-04-06 20:20 ` René Scharfe
2017-04-06 20:41 ` Jeff Hostetler
2017-04-05 17:38 ` [PATCH v5 2/4] read-cache: add strcmp_offset function git
2017-04-06 14:19 ` SZEDER Gábor
2017-04-06 15:58 ` Jeff Hostetler
2017-04-05 17:38 ` [PATCH v5 3/4] test-strcmp-offset: created test for strcmp_offset git
2017-04-05 22:47 ` SZEDER Gábor
2017-04-06 8:21 ` Johannes Schindelin
2017-04-06 14:25 ` Jeff Hostetler
2017-04-06 20:20 ` René Scharfe
2017-04-06 20:42 ` Jeff Hostetler
2017-04-05 17:38 ` [PATCH v5 4/4] read-cache: speed up add_index_entry during checkout git
2017-04-05 22:54 ` SZEDER Gábor
2017-04-06 14:05 ` Jeff Hostetler
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