Merged my speed improvements into the jQuery core (is actually 200b smaller now!). Additionally, added in some better reporting to the test suite, and fixed a bug with how selector tests were performmed.

build/test/data/testrunner.js

@@ -172,17 +172,33 @@ function ok(a, msg) {
 function isSet(a, b, msg) {
 	var ret = true;
 	if ( a && b && a.length == b.length ) {
-		for ( var i in a )
+		for ( var i = 0; i < a.length; i++ )
 			if ( a[i] != b[i] )
 				ret = false;
 	} else
 		ret = false;
 	if ( !ret )
-		_config.Test.push( [ ret, msg + " expected: " + b + " result: " + a ] );
+		_config.Test.push( [ ret, msg + " expected: " + serialArray(b) + " result: " + serialArray(a) ] );
 	else 
 		_config.Test.push( [ ret, msg ] );
 }
 
+function serialArray( a ) {
+	var r = [];
+	for ( var i = 0; i < a.length; i++ ) {
+		var str = a[i].nodeName;
+		if ( str ) {
+			str = str.toLowerCase();
+			if ( a[i].id )
+				str += "#" + a[i].id;
+		} else
+			str = a[i];
+		r.push( str );
+	}
+
+	return "[ " + r.join(", ") + " ]"
+}
+
 /**
  * Returns an array of elements with the given IDs, eg.
  * @example q("main", "foo", "bar")
@@ -201,7 +217,7 @@ function q() {
  * @result returns true if "//[a]" return two elements with the IDs 'foo' and 'baar'
  */
 function t(a,b,c) {
-	var f = jQuery.find(b);
+	var f = jQuery(b);
 	var s = "";
 	for ( var i = 0; i < f.length; i++ )
 		s += (s && ",") + '"' + f[i].id + '"';

src/jquery/jquery.js

@@ -817,9 +817,9 @@ jQuery.fn = jQuery.prototype = {
 	 * @cat DOM/Traversing
 	 */
 	find: function(t) {
-		return this.pushStack( jQuery.map( this, function(a){
+		return this.pushStack( jQuery.unique( jQuery.map( this, function(a){
 			return jQuery.find(t,a);
-		}), t );
+		}) ), t );
 	},
 
 	/**
@@ -1629,19 +1629,26 @@ jQuery.extend({
 	 * @cat JavaScript
 	 */
 	merge: function(first, second) {
-		var r = [].slice.call( first, 0 );
-
-		// Now check for duplicates between the two arrays
-		// and only add the unique items
 		for ( var i = 0, sl = second.length; i < sl; i++ )
-			// Check for duplicates
-			if ( jQuery.inArray( second[i], r ) == -1 )
-				// The item is unique, add it
 			first.push(second[i]);
 
 		return first;
 	},
 
+	unique: function(first) {
+		var r = [], num = jQuery.mergeNum++;
+
+		for ( var i = 0, fl = first.length; i < fl; i++ )
+			if ( first[i].mergeNum != num ) {
+				first[i].mergeNum = num;
+				r.push(first[i]);
+			}
+
+		return r;
+	},
+
+	mergeNum: 0,
+
 	/**
 	 * Filter items out of an array, by using a filter function.
 	 *
@@ -1735,17 +1742,7 @@ jQuery.extend({
 			}
 		}
 
-		var r = result.length ? [ result[0] ] : [];
-
-		check: for ( var i = 1, rl = result.length; i < rl; i++ ) {
-			for ( var j = 0; j < i; j++ )
-				if ( result[i] == r[j] )
-					continue check;
-
-			r.push( result[i] );
-		}
-
-		return r;
+		return result;
 	}
 });
 

src/selector/selector.js

@@ -195,7 +195,7 @@ jQuery.extend({
 					if ( ret[0] == context ) ret.shift();
 
 					// Merge the result sets
-					jQuery.merge( done, ret );
+					done = jQuery.merge( done, ret );
 
 					// Reset the context
 					r = ret = [context];
@@ -243,29 +243,25 @@ jQuery.extend({
 						// We need to find all descendant elements, it is more
 						// efficient to use getAll() when we are already further down
 						// the tree - we try to recognize that here
-						jQuery.each( ret, function(){
+						for ( var i = 0, rl = ret.length; i < rl; i++ ) {
 							// Grab the tag name being searched for
 							var tag = m[1] != "" || m[0] == "" ? "*" : m[2];
 
 							// Handle IE7 being really dumb about <object>s
-							if ( jQuery.nodeName(this, "object") && tag == "*" )
+							if ( tag == "*" && ret[i].nodeName.toLowerCase() == "object" )
 								tag = "param";
 
-							jQuery.merge( r,
-								m[1] != "" && ret.length != 1 ?
-									jQuery.getAll( this, [], m[1], m[2], rec ) :
-									this.getElementsByTagName( tag )
-							);
-						});
+							r = jQuery.merge( r, ret[i].getElementsByTagName( tag ));
+						}
 
 						// It's faster to filter by class and be done with it
-						if ( m[1] == "." && ret.length == 1 )
+						if ( m[1] == "." )
 							r = jQuery.grep( r, function(e) {
 								return rec.test(e.className);
 							});
 
 						// Same with ID filtering
-						if ( m[1] == "#" && ret.length == 1 ) {
+						if ( m[1] == "#" ) {
 							// Remember, then wipe out, the result set
 							var tmp = r;
 							r = [];
@@ -300,7 +296,7 @@ jQuery.extend({
 		if ( ret && ret[0] == context ) ret.shift();
 
 		// And combine the results
-		jQuery.merge( done, ret );
+		done = jQuery.merge( done, ret );
 
 		return done;
 	},
@@ -364,28 +360,6 @@ jQuery.extend({
 		return { r: r, t: t };
 	},
 
-	getAll: function( o, r, token, name, re ) {
-		for ( var s = o.firstChild; s; s = s.nextSibling )
-			if ( s.nodeType == 1 ) {
-				var add = true;
-
-				if ( token == "." )
-					add = s.className && re.test(s.className);
-				else if ( token == "#" )
-					add = s.getAttribute("id") == name;
-	
-				if ( add )
-					r.push( s );
-
-				if ( token == "#" && r.length ) break;
-
-				if ( s.firstChild )
-					jQuery.getAll( s, r, token, name, re );
-			}
-
-		return r;
-	},
-
 	/**
 	 * All ancestors of a given element.
 	 *