diff --git a/git-am.sh b/git-am.sh
index 6809aa07f6..4db4701c9e 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -466,6 +466,8 @@ do
 		"$GIT_DIR"/hooks/post-applypatch
 	fi
 
+	git gc --auto
+
 	go_next
 done
 
diff --git a/git-commit.sh b/git-commit.sh
index 1d04f1ff31..d22d35eadc 100755
--- a/git-commit.sh
+++ b/git-commit.sh
@@ -652,6 +652,7 @@ git rerere
 
 if test "$ret" = 0
 then
+	git gc --auto
 	if test -x "$GIT_DIR"/hooks/post-commit
 	then
 		"$GIT_DIR"/hooks/post-commit
diff --git a/git-merge.sh b/git-merge.sh
index 3a01db0d75..697bec24fa 100755
--- a/git-merge.sh
+++ b/git-merge.sh
@@ -82,6 +82,7 @@ finish () {
 			;;
 		*)
 			git update-ref -m "$rlogm" HEAD "$1" "$head" || exit 1
+			git gc --auto
 			;;
 		esac
 		;;
diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index abc2b1c3e0..8258b7adf9 100755
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -307,6 +307,8 @@ do_next () {
 	rm -rf "$DOTEST" &&
 	warn "Successfully rebased and updated $HEADNAME."
 
+	git gc --auto
+
 	exit
 }