improve performance by less data copying

lib/item.js

@@ -1,6 +1,6 @@
 var currentId = 0
+  , parseUrl = require('./parseUrl')
   , pathRegExp = require('../').pathRegExp
-  , parseUrl = require('url').parse;
 
 function Item (args, cache) {
   this.weight = 0;
@@ -57,8 +57,13 @@ Item.prototype.match = function(req) {
     return true;
   }
 
-  var reqPath = parseUrl(req.url).pathname
-    , matches = this.regex.exec(reqPath)
+  var reqPath = parseUrl(req).pathname;
+
+  // Exact match
+  if (reqPath === this.path) return {};
+
+  // Try the regex
+  var matches = this.regex.exec(reqPath)
 
   if (!matches) return false;
   matches.shift();

lib/middler.js

@@ -1,4 +1,5 @@
 var matcher = require('../').matcher
+  , parseUrl = require('./parseUrl')
   , pathRegExp = require('../').pathRegExp
   , Item = require('../').Item
 
@@ -20,11 +21,13 @@ Middler.prototype.attach = function (server) {
  * Middleware kernel. Embeddable in other middleware!
  */
 Middler.prototype.handler = function middlerKernel (req, res, next) {
-  var runlist = this.runlist()
-    , thisArg = {req: req, res: res};
+  var thisArg = {req: req, res: res}
+    , i = 0
+    , items = this.items
+    ;
 
   (function nextItem () {
-    var item = runlist.shift();
+    var item = items[i++];
 
     if (item) {
       var m = item.match(req);
@@ -133,11 +136,4 @@ Middler.prototype.sort = function () {
     return a[prop] < b[prop] ? -1 : 1;
   }
   this.items.sort(sortProp.bind(null, 'weight'));
-};
-
-/**
- * Returns a copy of all items.
- */
-Middler.prototype.runlist = function () {
-  return this.items.slice(0);
 };

lib/parseUrl.js

@@ -1,8 +1,13 @@
 var parse = require('url').parse;
 
 // Cached parsed urls.
-var cache = {};
+module.exports = function parseUrl (req) {
+  var parsed = req._parsedUrl;
 
-module.exports = function parseUrl (url) {
-  return cache[url] || (cache[url] = parse(url));
+  if (parsed && parsed.href == req.url) {
+    return parsed;
+  }
+  else {
+    return req._parsedUrl = parse(req.url);
+  }
 };