add authname memory cache

actions which concern multiple pages (e.g. search, backlinks, recents)
end up repeatedly encoding the current user's name and groups. This
change caches the results of the encoding allowing them to be reused.

darcs-hash:20060923161206-9b6ab-a3ec8f1c2ec284d84b9ff85cba1e56165b2967a7.gz

1 files changed, 13 insertions, 6 deletions

diff --git a/inc/auth.php b/inc/auth.php
index db53a4c19..63f84e141 100644
--- a/inc/auth.php
+++ b/inc/auth.php
@@ -380,13 +380,20 @@ function auth_aclcheck($id,$user,$groups){
  * @see rawurldecode()
  */
 function auth_nameencode($name,$skip_group=false){
-  if($skip_group && $name{0} =='@'){
-    return '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
-                            "'%'.dechex(ord('\\1'))",substr($name,1));
-  }else{
-    return preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
-                        "'%'.dechex(ord('\\1'))",$name);
+  global $cache_authname;
+  $cache =& $cache_authname;
+
+  if (!isset($cache[$name][$skip_group])) {
+    if($skip_group && $name{0} =='@'){
+      $cache[$name][$skip_group] = '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
+                                                    "'%'.dechex(ord('\\1'))",substr($name,1));
+    }else{
+      $cache[$name][$skip_group] = preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
+                                                "'%'.dechex(ord('\\1'))",$name);
+    }
   }
+
+  return $cache[$name][$skip_group];
 }
 
 /**