mirror/ git
1
0
Fork 0
mirror of https://github.com/git/git.git synced 2024-05-21 19:46:09 +02:00
Code

preload-index: avoid lstat for skip-worktree items 

Teach preload-index to avoid lstat() calls for index-entries
with skip-worktree bit set.  This is a performance optimization.

During a sparse-checkout, the skip-worktree bit is set on items
that were not populated and therefore are not present in the
worktree.  The per-thread preload-index loop performs a series
of tests on each index-entry as it attempts to compare the
worktree version with the index and mark them up-to-date.
This patch short-cuts that work.

On a Windows 10 system with a very large repo (450MB index)
and various levels of sparseness, performance was improved
in the {preloadindex=true, fscache=false} case by 80% and
in the {preloadindex=true, fscache=true} case by 20% for various
commands.

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff Hostetler 2017-02-10 16:10:39 +01:00 committed by Junio C Hamano
parent 3b9e3c2ced
commit e596acc23a
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
preload-index.c
View File

@ -53,6 +53,8 @@ static void *preload_thread(void *_data)
continue;
if (ce_uptodate(ce))
continue;
if (ce_skip_worktree(ce))
continue;
if (!ce_path_match(ce, &p->pathspec, NULL))
continue;
if (threaded_has_symlink_leading_path(&cache, ce->name, ce_namelen(ce)))