[PATCH 2 of 4] hgweb: optimize process_dates function

[Alexander Plavin]

# HG changeset patch
# User Alexander Plavin <alexander at plav.in>
# Date 1378459858 -14400
#      Fri Sep 06 13:30:58 2013 +0400
# Node ID 26747ba40308c83c5efbc4906c9096cda20de5cc
# Parent  c3e2dd350a17ce393b36fbfb546a2d7707f2b5d7
hgweb: optimize process_dates function

This function looped over every node due to getElementsByTagName('*'), instead
of using selectors. In this patch we use querySelectorAll('.age') and process
only these nodes, which is much faster and also doesn't require extra condition.

Browser compatibility isn't sacrificed: IE 8+, FF 3.5+, Opera 10+.

diff -r c3e2dd350a17 -r 26747ba40308 mercurial/templates/static/mercurial.js
--- a/mercurial/templates/static/mercurial.js	Fri Sep 06 13:30:58 2013 +0400
+++ b/mercurial/templates/static/mercurial.js	Fri Sep 06 13:30:58 2013 +0400
@@ -253,21 +253,18 @@
 		}
 	}
 
-    var nodes = document.getElementsByTagName('*');
-    var ageclass = new RegExp('\\bage\\b');
+    var nodes = document.querySelectorAll('.age');
     var dateclass = new RegExp('\\bdate\\b');
     for (var i=0; i<nodes.length; ++i){
         var node = nodes[i];
         var classes = node.className;
-        if (ageclass.test(classes)){
-            var agevalue = age(node.textContent);
-            if (dateclass.test(classes)){
-                // We want both: date + (age)
-                node.textContent += ' ('+agevalue+')';
-            } else {
-                node.title = node.textContent;
-                node.textContent = agevalue;
-            }
+        var agevalue = age(node.textContent);
+        if (dateclass.test(classes)){
+            // We want both: date + (age)
+            node.textContent += ' ('+agevalue+')';
+        } else {
+            node.title = node.textContent;
+            node.textContent = agevalue;
         }
     }
 }