Added a simple cache for xhr objects in the xhr transport.

diff --git a/src/ajax/xhr.js b/src/ajax/xhr.js
index 7d71402..032668f 100644 (file)
--- a/src/ajax/xhr.js
+++ b/src/ajax/xhr.js
@@ -6,6 +6,9 @@ var // Next fake timer id
        // Callbacks hashtable
        xhrs = {},
 
+       // XHR pool
+       xhrPool = [],
+
        // #5280: see end of file
        xhrUnloadAbortMarker = [];
 
@@ -21,7 +24,7 @@ jQuery.ajax.transport( function( s , determineDataType ) {
 
                        send: function(headers, complete) {
 
-                               var xhr = s.xhr(),
+                               var xhr = xhrPool.pop() || s.xhr(),
                                        handle;
 
                                // Open the socket
@@ -53,6 +56,8 @@ jQuery.ajax.transport( function( s , determineDataType ) {
                                try {
                                        xhr.send( ( s.hasContent && s.data ) || null );
                                } catch(e) {
+                                       // Store back in pool
+                                       xhrPool.push( xhr );
                                        complete(0, "error", "" + e);
                                        return;
                                }
@@ -64,10 +69,12 @@ jQuery.ajax.transport( function( s , determineDataType ) {
                                        if ( callback && ( abortStatusText || xhr.readyState === 4 ) ) {
 
                                                // Do not listen anymore
+                                               // and Store back in pool
                                                if (handle) {
                                                        xhr.onreadystatechange = jQuery.noop;
                                                        delete xhrs[ handle ];
                                                        handle = undefined;
+                                                       xhrPool.push( xhr );
                                                }
 
                                                callback = 0;