From e5ee89ec9a11804b39e9722f47eeeb00648f37ea Mon Sep 17 00:00:00 2001 From: =?utf8?q?Scott=20Gonz=C3=A1lez?= Date: Fri, 14 Jan 2011 09:55:40 -0500 Subject: [PATCH] Avoid running jQuery.unique() for methods that are guaranteed to produce a unique result set. Fixes #7964 - Some traversal methods perform an unnecessary uniqueness check. --- src/traversing.js | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/src/traversing.js b/src/traversing.js index 689e901..e169be0 100644 --- a/src/traversing.js +++ b/src/traversing.js @@ -6,7 +6,14 @@ var runtil = /Until$/, rmultiselector = /,/, isSimple = /^.[^:#\[\.,]*$/, slice = Array.prototype.slice, - POS = jQuery.expr.match.POS; + POS = jQuery.expr.match.POS, + // methods guaranteed to produce a unique set when starting from a unique set + guaranteedUnique = { + children: true, + contents: true, + next: true, + prev: true + }; jQuery.fn.extend({ find: function( selector ) { @@ -206,7 +213,7 @@ jQuery.each({ ret = jQuery.filter( selector, ret ); } - ret = this.length > 1 ? jQuery.unique( ret ) : ret; + ret = this.length > 1 && !guaranteedUnique[ name ] ? jQuery.unique( ret ) : ret; if ( (this.length > 1 || rmultiselector.test( selector )) && rparentsprev.test( name ) ) { ret = ret.reverse(); -- 1.7.10.4