From 46e0c5742ce2d380904987b8a2655fe157faca3e Mon Sep 17 00:00:00 2001
From: Joey Hess <joey@kitenet.net>
Date: Wed, 10 Jul 2013 17:40:33 -0400
Subject: [PATCH] optimize for common case where list is not changed

---
 IkiWiki/Render.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/IkiWiki/Render.pm b/IkiWiki/Render.pm
index c41dac9f6..58b374ad7 100644
--- a/IkiWiki/Render.pm
+++ b/IkiWiki/Render.pm
@@ -773,7 +773,7 @@ sub refresh () {
 	my %existingfiles;
 	run_hooks(needsbuild => sub {
 		my $ret=shift->($changed, [@$del, @$internal_del]);
-		if (ref $ret eq 'ARRAY') {
+		if (ref $ret eq 'ARRAY' && $ret != $changed) {
 			if (! %existingfiles) {
 				foreach my $f (@$files) {
 					$existingfiles{$f}=1;
-- 
2.39.5