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author | Kjetil Barvik <barvik@broadpark.no> | 2009-02-23 21:02:57 +0300 |
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committer | Junio C Hamano <gitster@pobox.com> | 2009-02-24 05:04:20 +0300 |
commit | e1afca4fd3e7cb4000874e991277f10119de4ad2 (patch) | |
tree | c71e47c710fafa7042ebebe3d70a22ae1c125d02 /unpack-trees.c | |
parent | 1dcafcc0e639ecc69b54421bda5f2270ed2601eb (diff) |
write_index(): update index_state->timestamp after flushing to disk
Since this timestamp is used to check for racy-clean files, it is
important to keep it uptodate.
For the 'git checkout' command without the '-q' option, this make a
huge difference. Before, each and every file which was updated, was
racy-clean after the call to unpack_trees() and write_index() but
before the GIT process ended.
And because of the call to show_local_changes() in builtin-checkout.c,
we ended up reading those files back into memory, doing a SHA1 to
check if the files was really different from the index. And, of
course, no file was different.
With this fix, 'git checkout' without the '-q' option should now be
almost as fast as with the '-q' option, but not quite, as we still do
some few lstat(2) calls more without the '-q' option.
Below is some average numbers for 10 checkout's to v2.6.27 and 10 to
v2.6.25 of the Linux kernel, to show the difference:
before (git version 1.6.2.rc1.256.g58a87):
7.860 user 2.427 sys 19.465 real 52.8% CPU faults: 0 major 95331 minor
after:
6.184 user 2.160 sys 17.619 real 47.4% CPU faults: 0 major 38994 minor
Signed-off-by: Kjetil Barvik <barvik@broadpark.no>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'unpack-trees.c')
0 files changed, 0 insertions, 0 deletions