From 671c9b7e315db89081cc69f83a8f405e4aca37bc Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Thu, 13 Nov 2008 16:36:30 -0800 Subject: 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 Signed-off-by: Junio C Hamano --- Documentation/config.txt | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'Documentation') 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 -- cgit v1.2.1