From e942edf96ea6229d3d02ae94da131679459bc0c6 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Mon, 13 Jul 2026 11:07:10 -0700
Subject: [PATCH] onemerge: quick check and exit when the numbers match

Before diving into inspecting each merge commit to see if it merges
more than two topics at the same time, we can count the number of
branches that are merged and the number of merge commits.  If they
match, we can skip the more expensive check.

This will break if we merge a topic in multiple steps, but we do not
do that these days, so it would be a reasonable optimization.
---
 onemerge.sh | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/onemerge.sh b/onemerge.sh
index d0bed02db5..43f07f9d61 100755
--- a/onemerge.sh
+++ b/onemerge.sh
@@ -4,6 +4,14 @@
 
 endpoint=${1-seen}
 
+cnt1=$(git lgf --grep="Merge branch '" master..$endpoint | wc -l)
+cnt2=$(git branch --no-merged master --merged seen '??/*' | wc -l)
+
+if test $cnt1 -eq $cnt2
+then
+	exit 0
+fi
+
 tmp=/var/tmp/e.$$
 rm -f "$tmp.1" "$tmp.2" &&
 prev= &&