From: Jeff Hostetler <jeffh...@microsoft.com>
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 <jeffh...@microsoft.com>
Signed-off-by: Johannes Schindelin <johannes.schinde...@gmx.de>
---
Published-As: https://github.com/dscho/git/releases/tag/preload-index-sparse-v1
Fetch-It-Via: git fetch https://github.com/dscho/git preload-index-sparse-v1
preload-index.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/preload-index.c b/preload-index.c
index c1fe3a3ef9c..70a4c808783 100644
--- a/preload-index.c
+++ b/preload-index.c
@@ -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)))
base-commit: 6e3a7b3398559305c7a239a42e447c21a8f39ff8
--
2.11.1.windows.1
