Added caching to domManip. Fixes #4883.

diff --git a/src/manipulation.js b/src/manipulation.js
index 13983fb..62009be 100644 (file)
--- a/src/manipulation.js
+++ b/src/manipulation.js
@@ -137,24 +137,55 @@ jQuery.fn.extend({
        },
 
        domManip: function( args, table, callback ) {
+               var fragment, scripts, cacheable, cached, cacheresults, first;
+
                if ( this[0] ) {
-                       var fragment = (this[0].ownerDocument || this[0]).createDocumentFragment(),
-                               scripts = jQuery.clean( args, (this[0].ownerDocument || this[0]), fragment ),
-                               first = fragment.firstChild;
+                       if ( args.length === 1 && typeof args[0] === "string" ) {
+                               cacheable = true;
+                               cacheresults = jQuery.fragments[ args[0] ];
+                               if ( cacheresults ) {
+                                       if ( cacheresults !== 1 ) {
+                                               fragment = cacheresults;
+                                       }
+                                       cached = true;
+                               }
+                       }
+                       
+                       if ( !fragment ) {
+                               fragment = (this[0].ownerDocument || this[0]).createDocumentFragment();
+                               scripts = jQuery.clean( args, (this[0].ownerDocument || this[0]), fragment );
+                       }
+
+                       first = fragment.firstChild;
 
-                       if ( first )
-                               for ( var i = 0, l = this.length; i < l; i++ )
-                                       callback.call( root(this[i], first), this.length > 1 || i > 0 ?
-                                                       fragment.cloneNode(true) : fragment );
+                       if ( first ) {
+                               table = table && jQuery.nodeName( first, "tr" );
 
-                       if ( scripts )
+                               for ( var i = 0, l = this.length; i < l; i++ ) {
+                                       callback.call(
+                                               table ?
+                                                       root(this[i], first) :
+                                                       this[i],
+                                               cacheable || this.length > 1 || i > 0 ?
+                                                       fragment.cloneNode(true) :
+                                                       fragment
+                                       );
+                               }
+                       }
+
+                       if ( scripts ) {
                                jQuery.each( scripts, evalScript );
+                       }
+
+                       if ( cacheable ) {
+                               jQuery.fragments[ args[0] ] = cacheresults ? fragment : 1;
+                       }
                }
 
                return this;
 
                function root( elem, cur ) {
-                       return table && jQuery.nodeName(elem, "table") && jQuery.nodeName(cur, "tr") ?
+                       return jQuery.nodeName(elem, "table") ?
                                (elem.getElementsByTagName("tbody")[0] ||
                                elem.appendChild(elem.ownerDocument.createElement("tbody"))) :
                                elem;
@@ -162,6 +193,8 @@ jQuery.fn.extend({
        }
 });
 
+jQuery.fragments = {};
+
 jQuery.each({
        appendTo: "append",
        prependTo: "prepend",