From dd3ae36084fe33dd169103429bc1a417ccfb1829 Mon Sep 17 00:00:00 2001
From: Mike Cochrane <mikec@mikenz.geek.nz>
Date: Thu, 24 Jul 2008 19:46:19 -0400
Subject: [PATCH] Cache the DateTimeZon objects

darcs-hash:20080724234619-533db-015a2751ade3b5b8befb8a735fe89acd4742c4b9.gz
---
 lib/util.php | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/util.php b/lib/util.php
index 9e3bc3d497..4702bdb63f 100644
--- a/lib/util.php
+++ b/lib/util.php
@@ -941,9 +941,17 @@ function common_date_string($dt) {
 }
 
 function common_exact_date($dt) {
+    static $_utc;
+    static $_siteTz;
+
+    if (!$_utc) {
+        $_utc = new DateTimeZone('UTC');
+        $_siteTz = new DateTimeZone(common_timezone());
+    }
+
 	$dateStr = date('d F Y H:i:s', strtotime($dt));
-	$d = new DateTime($dateStr, new DateTimeZone('UTC'));
-	$d->setTimezone(new DateTimeZone(common_timezone()));
+	$d = new DateTime($dateStr, $_utc);
+	$d->setTimezone($_siteTz);
 	return $d->format(DATE_RFC850);
 }