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cherry_pick_list: quit early if one side is empty

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The --cherry-pick logic starts by counting the commits on each side,
so that it can filter away commits on the bigger one.  However, so
far it missed an opportunity for optimization: it doesn't need to do
any work if either side is empty.

This in particular helps the common use-case 'git rebase -i HEAD~$n':
it internally uses --cherry-pick, but since HEAD~$n is a direct
ancestor the left side is always empty.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Thomas Rast 2010-02-20 12:42:04 +01:00 committed by Junio C Hamano
parent ea02eef096
commit 36c079756f
1 changed files with 3 additions and 0 deletions
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3
revision.c
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@ -514,6 +514,9 @@ static void cherry_pick_list(struct commit_list *list, struct rev_info *revs)
right_count++;
}
if (!left_count || !right_count)
return;
left_first = left_count < right_count;
init_patch_ids(&ids);
if (revs->diffopt.nr_paths) {