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| author |  Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-13 16:36:30 -0800 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2008-11-14 19:11:49 -0800 |
| commit | 671c9b7e315db89081cc69f83a8f405e4aca37bc (patch) | |
| tree | 0410fb1af855fc65a7d96dd15410db16e41cbc9f /Documentation | |
| parent | Merge git://git.bogomips.org/git-svn (diff) | |
| download | tgif-671c9b7e315db89081cc69f83a8f405e4aca37bc.tar.xz | |
Add cache preload facility
This can do the lstat() storm in parallel, giving potentially much
improved performance for cold-cache cases or things like NFS that have
weak metadata caching.
Just use "read_cache_preload()" instead of "read_cache()" to force an
optimistic preload of the index stat data. The function takes a
pathspec as its argument, allowing us to preload only the relevant
portion of the index.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/config.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt index 32dcd643d2..0d96e763ac 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -413,6 +413,15 @@ data writes properly, but can be useful for filesystems that do not use journalling (traditional UNIX filesystems) or that only journal metadata and not file contents (OS X's HFS+, or Linux ext3 with "data=writeback"). +core.preloadindex:: + Enable parallel index preload for operations like 'git diff' ++ +This can speed up operations like 'git diff' and 'git status' especially +on filesystems like NFS that have weak caching semantics and thus +relatively high IO latencies. With this set to 'true', git will do the +index comparison to the filesystem data in parallel, allowing +overlapping IO's. + alias.*:: Command aliases for the linkgit:git[1] command wrapper - e.g. after defining "alias.last = cat-file commit HEAD", the invocation |