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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/208813">208813</a></dd>
<dt>Author</dt> <dd>cdumez@apple.com</dd>
<dt>Date</dt> <dd>2016-11-16 14:30:43 -0800 (Wed, 16 Nov 2016)</dd>
</dl>
<h3>Log Message</h3>
<pre>Micro-optimize ContainerNode::removeBetween()
https://bugs.webkit.org/show_bug.cgi?id=164832
Reviewed by Sam Weinig.
Micro-optimize ContainerNode::removeBetween() by updating pointers only
when strictly needed and reducing branching.
No new tests, no Web-exposed behavior change.
* dom/ContainerNode.cpp:
(WebCore::ContainerNode::removeBetween):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoredomContainerNodecpp">trunk/Source/WebCore/dom/ContainerNode.cpp</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (208812 => 208813)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog 2016-11-16 22:28:33 UTC (rev 208812)
+++ trunk/Source/WebCore/ChangeLog 2016-11-16 22:30:43 UTC (rev 208813)
</span><span class="lines">@@ -1,5 +1,20 @@
</span><span class="cx"> 2016-11-16 Chris Dumez <cdumez@apple.com>
</span><span class="cx">
</span><ins>+ Micro-optimize ContainerNode::removeBetween()
+ https://bugs.webkit.org/show_bug.cgi?id=164832
+
+ Reviewed by Sam Weinig.
+
+ Micro-optimize ContainerNode::removeBetween() by updating pointers only
+ when strictly needed and reducing branching.
+
+ No new tests, no Web-exposed behavior change.
+
+ * dom/ContainerNode.cpp:
+ (WebCore::ContainerNode::removeBetween):
+
+2016-11-16 Chris Dumez <cdumez@apple.com>
+
</ins><span class="cx"> Micro-optimize AtomicHTMLToken::initializeAttributes()
</span><span class="cx"> https://bugs.webkit.org/show_bug.cgi?id=164826
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceWebCoredomContainerNodecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/dom/ContainerNode.cpp (208812 => 208813)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/dom/ContainerNode.cpp 2016-11-16 22:28:33 UTC (rev 208812)
+++ trunk/Source/WebCore/dom/ContainerNode.cpp 2016-11-16 22:30:43 UTC (rev 208813)
</span><span class="lines">@@ -558,17 +558,25 @@
</span><span class="cx">
</span><span class="cx"> destroyRenderTreeIfNeeded(oldChild);
</span><span class="cx">
</span><del>- if (nextChild)
</del><ins>+ if (nextChild) {
</ins><span class="cx"> nextChild->setPreviousSibling(previousChild);
</span><del>- if (previousChild)
</del><ins>+ oldChild.setNextSibling(nullptr);
+ } else {
+ ASSERT(m_lastChild == &oldChild);
+ m_lastChild = previousChild;
+ }
+ if (previousChild) {
</ins><span class="cx"> previousChild->setNextSibling(nextChild);
</span><del>- if (m_firstChild == &oldChild)
</del><ins>+ oldChild.setPreviousSibling(nullptr);
+ } else {
+ ASSERT(m_firstChild == &oldChild);
</ins><span class="cx"> m_firstChild = nextChild;
</span><del>- if (m_lastChild == &oldChild)
- m_lastChild = previousChild;
</del><ins>+ }
</ins><span class="cx">
</span><del>- oldChild.setPreviousSibling(nullptr);
- oldChild.setNextSibling(nullptr);
</del><ins>+ ASSERT(m_firstChild != &oldChild);
+ ASSERT(m_lastChild != &oldChild);
+ ASSERT(!oldChild.previousSibling());
+ ASSERT(!oldChild.nextSibling());
</ins><span class="cx"> oldChild.setParentNode(nullptr);
</span><span class="cx">
</span><span class="cx"> document().adoptIfNeeded(&oldChild);
</span></span></pre>
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