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hixie: Allow getElementsByClassName() etc to cache results if desired. (this can result in script-detectable cache-sensitive behaviour, but is a massive performance win. Let's hope nobody ever depends on this.) (whatwg r4856)

From: poot <cvsmail@w3.org>
Date: Thu, 18 Mar 2010 08:24:34 +0900 (JST)
To: public-html-diffs@w3.org
Message-Id: <20100317232434.9F3642BC13@toro.w3.mag.keio.ac.jp>
hixie: Allow getElementsByClassName() etc to cache results if desired.
(this can result in script-detectable cache-sensitive behaviour, but is
a massive performance win. Let's hope nobody ever depends on this.)
(whatwg r4856)

http://dev.w3.org/cvsweb/html5/spec/Overview.html?r1=1.3890&r2=1.3891&f=h
http://html5.org/tools/web-apps-tracker?from=4855&to=4856

===================================================================
RCS file: /sources/public/html5/spec/Overview.html,v
retrieving revision 1.3890
retrieving revision 1.3891
diff -u -d -r1.3890 -r1.3891
--- Overview.html	17 Mar 2010 00:02:46 -0000	1.3890
+++ Overview.html	17 Mar 2010 23:24:03 -0000	1.3891
@@ -6471,11 +6471,11 @@
   <code><a href="#nodelist">NodeList</a></code>. If the document is in <a href="#quirks-mode">quirks
   mode</a>, then the comparisons for the classes must be done in an
   <a href="#ascii-case-insensitive">ASCII case-insensitive</a> manner, otherwise, the
-  comparisons must be done in a <a href="#case-sensitive">case-sensitive</a> manner. A
-  new <code><a href="#nodelist">NodeList</a></code> object must be returned each time unless
-  the argument is the same as the last time the method was invoked on
-  this <code><a href="#document">Document</a></code> object, in which case the object must be
-  the same as the object returned by the previous call.</p>
+  comparisons must be done in a <a href="#case-sensitive">case-sensitive</a> manner.
+  When the method is invoked on a <code><a href="#document">Document</a></code> object again
+  with the same argument, the user agent may return the same object as
+  the object returned by the earlier call. In other cases, a new
+  <code><a href="#nodelist">NodeList</a></code> object must be returned.</p>
 
   <p>The <dfn id="dom-getelementsbyclassname" title="dom-getElementsByClassName"><code>getElementsByClassName(<var title="">classNames</var>)</code></dfn> method on the
   <code><a href="#htmlelement">HTMLElement</a></code> interface must return a live
@@ -6483,11 +6483,11 @@
   <code><a href="#htmldocument">HTMLDocument</a></code> <code title="dom-document-getElementsByClassName"><a href="#dom-document-getelementsbyclassname">getElementsByClassName()</a></code>
   method would return when passed the same argument(s), excluding any
   elements that are not descendants of the <code><a href="#htmlelement">HTMLElement</a></code>
-  object on which the method was invoked. A new <code><a href="#nodelist">NodeList</a></code>
-  object must be returned each time unless the argument is the same as
-  the last time the method was invoked on this
-  <code><a href="#htmlelement">HTMLElement</a></code> object, in which case the object must be
-  the same as the object returned by the previous call.</p>
+  object on which the method was invoked.
+  When the method is invoked on an <code><a href="#htmlelement">HTMLElement</a></code> object
+  again with the same argument, the user agent may return the same
+  object as the object returned by the earlier call. In other cases, a
+  new <code><a href="#nodelist">NodeList</a></code> object must be returned.</p>
 
   </div><p>HTML, SVG, and MathML elements define which classes they are in
   by having an attribute with no namespace with the name <code title="">class</code> containing a space-separated list of classes
Received on Wednesday, 17 March 2010 23:25:03 GMT

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