[PATCH 14/19] reset [--mixed]: don't write index file twice
From: Martin von Zweigbergk <hidden>
Date: 2016-06-15 22:55:42
Subsystem:
the rest · Maintainer:
Linus Torvalds
When doing a mixed reset without paths, the index is locked, read,
reset, and written back as part of the actual reset operation (in
reset_index()). Then, when showing the list of worktree modifications,
we lock the index again, refresh it, and write it.
Change this so we only write the index once, making "git reset" a
little faster. It does mean that the index lock will be held a little
longer, but the difference is small compared to the time spent
refreshing the index.
There is one minor functional difference: We used to say "Could not
write new index file." if the first write failed, and "Could not
refresh index" if the second write failed. Now, we will only use the
first message.
This speeds up "git reset" a little on the linux-2.6 repo (best of
five, warm cache):
Before After
real 0m0.239s 0m0.214s
user 0m0.160s 0m0.130s
sys 0m0.070s 0m0.080s
---
builtin/reset.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/builtin/reset.c b/builtin/reset.c
index 2243b95..254afa9 100644
--- a/builtin/reset.c
+++ b/builtin/reset.c@@ -335,6 +335,11 @@ int cmd_reset(int argc, const char **argv, const char *prefix) err = reset_index(sha1, MIXED, quiet); if (err) die(_("Could not reset index file to revision '%s'."), rev); + + if (reset_type == MIXED) /* Report what has not been updated. */ + update_index_refresh( + quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN); + if (write_cache(newfd, active_cache, active_nr) || commit_locked_index(lock)) die(_("Could not write new index file."));
@@ -346,15 +351,6 @@ int cmd_reset(int argc, const char **argv, const char *prefix) if (reset_type == HARD && !update_ref_status && !quiet) print_new_head_line(commit); - else if (reset_type == MIXED) { /* Report what has not been updated. */ - struct lock_file *index_lock = xcalloc(1, sizeof(struct lock_file)); - int fd = hold_locked_index(index_lock, 1); - update_index_refresh( - quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN); - if (write_cache(fd, active_cache, active_nr) || - commit_locked_index(index_lock)) - error("Could not refresh index"); - } remove_branch_state();
--
1.8.1.rc3.331.g1ef2165