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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/179403">179403</a></dd>
<dt>Author</dt> <dd>cdumez@apple.com</dd>
<dt>Date</dt> <dd>2015-01-30 09:43:45 -0800 (Fri, 30 Jan 2015)</dd>
</dl>

<h3>Log Message</h3>
<pre>Optimize MemoryCache::getSessionMap() a bit
https://bugs.webkit.org/show_bug.cgi?id=141069

Reviewed by Anders Carlsson.

Optimize MemoryCache::getSessionMap() a bit by doing 1 HashMap lookup
instead of previously 3. Also rename the method to sessionResources()
as we usually don't use &quot;get&quot; prefix for getters.

* loader/cache/MemoryCache.cpp:
(WebCore::MemoryCache::sessionResources):
(WebCore::MemoryCache::add):
(WebCore::MemoryCache::revalidationSucceeded):
(WebCore::MemoryCache::resourceForRequest):
(WebCore::MemoryCache::removeImageFromCache):
(WebCore::MemoryCache::remove):
(WebCore::MemoryCache::getSessionMap): Deleted.
* loader/cache/MemoryCache.h:</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreloadercacheMemoryCachecpp">trunk/Source/WebCore/loader/cache/MemoryCache.cpp</a></li>
<li><a href="#trunkSourceWebCoreloadercacheMemoryCacheh">trunk/Source/WebCore/loader/cache/MemoryCache.h</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (179402 => 179403)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2015-01-30 17:40:51 UTC (rev 179402)
+++ trunk/Source/WebCore/ChangeLog        2015-01-30 17:43:45 UTC (rev 179403)
</span><span class="lines">@@ -1,5 +1,26 @@
</span><span class="cx"> 2015-01-30  Chris Dumez  &lt;cdumez@apple.com&gt;
</span><span class="cx"> 
</span><ins>+        Optimize MemoryCache::getSessionMap() a bit
+        https://bugs.webkit.org/show_bug.cgi?id=141069
+
+        Reviewed by Anders Carlsson.
+
+        Optimize MemoryCache::getSessionMap() a bit by doing 1 HashMap lookup
+        instead of previously 3. Also rename the method to sessionResources()
+        as we usually don't use &quot;get&quot; prefix for getters.
+
+        * loader/cache/MemoryCache.cpp:
+        (WebCore::MemoryCache::sessionResources):
+        (WebCore::MemoryCache::add):
+        (WebCore::MemoryCache::revalidationSucceeded):
+        (WebCore::MemoryCache::resourceForRequest):
+        (WebCore::MemoryCache::removeImageFromCache):
+        (WebCore::MemoryCache::remove):
+        (WebCore::MemoryCache::getSessionMap): Deleted.
+        * loader/cache/MemoryCache.h:
+
+2015-01-30  Chris Dumez  &lt;cdumez@apple.com&gt;
+
</ins><span class="cx">         Store MemoryCache's live decoded resources in a ListHashSet
</span><span class="cx">         https://bugs.webkit.org/show_bug.cgi?id=141051
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunkSourceWebCoreloadercacheMemoryCachecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/loader/cache/MemoryCache.cpp (179402 => 179403)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/loader/cache/MemoryCache.cpp        2015-01-30 17:40:51 UTC (rev 179402)
+++ trunk/Source/WebCore/loader/cache/MemoryCache.cpp        2015-01-30 17:43:45 UTC (rev 179403)
</span><span class="lines">@@ -74,14 +74,12 @@
</span><span class="cx"> {
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-MemoryCache::CachedResourceMap&amp; MemoryCache::getSessionMap(SessionID sessionID)
</del><ins>+MemoryCache::CachedResourceMap&amp; MemoryCache::sessionResources(SessionID sessionID)
</ins><span class="cx"> {
</span><span class="cx">     ASSERT(sessionID.isValid());
</span><del>-    CachedResourceMap* map = m_sessionResources.get(sessionID);
-    if (!map) {
-        m_sessionResources.set(sessionID, std::make_unique&lt;CachedResourceMap&gt;());
-        map = m_sessionResources.get(sessionID);
-    }
</del><ins>+    auto&amp; map = m_sessionResources.add(sessionID, nullptr).iterator-&gt;value;
+    if (!map)
+        map = std::make_unique&lt;CachedResourceMap&gt;();
</ins><span class="cx">     return *map;
</span><span class="cx"> }
</span><span class="cx"> 
</span><span class="lines">@@ -106,7 +104,7 @@
</span><span class="cx"> 
</span><span class="cx">     ASSERT(WTF::isMainThread());
</span><span class="cx"> 
</span><del>-    CachedResourceMap&amp; resources = getSessionMap(resource-&gt;sessionID());
</del><ins>+    CachedResourceMap&amp; resources = sessionResources(resource-&gt;sessionID());
</ins><span class="cx"> #if ENABLE(CACHE_PARTITIONING)
</span><span class="cx">     CachedResourceItem* originMap = resources.get(resource-&gt;url());
</span><span class="cx">     if (!originMap) {
</span><span class="lines">@@ -140,7 +138,7 @@
</span><span class="cx"> 
</span><span class="cx">     remove(revalidatingResource);
</span><span class="cx"> 
</span><del>-    CachedResourceMap&amp; resources = getSessionMap(resource-&gt;sessionID());
</del><ins>+    CachedResourceMap&amp; resources = sessionResources(resource-&gt;sessionID());
</ins><span class="cx"> #if ENABLE(CACHE_PARTITIONING)
</span><span class="cx">     ASSERT(!resources.get(resource-&gt;url()) || !resources.get(resource-&gt;url())-&gt;get(resource-&gt;cachePartition()));
</span><span class="cx">     CachedResourceItem* originMap = resources.get(resource-&gt;url());
</span><span class="lines">@@ -183,7 +181,7 @@
</span><span class="cx"> 
</span><span class="cx"> CachedResource* MemoryCache::resourceForRequest(const ResourceRequest&amp; request, SessionID sessionID)
</span><span class="cx"> {
</span><del>-    return resourceForRequestImpl(request, getSessionMap(sessionID));
</del><ins>+    return resourceForRequestImpl(request, sessionResources(sessionID));
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> CachedResource* MemoryCache::resourceForRequestImpl(const ResourceRequest&amp; request, CachedResourceMap&amp; resources)
</span><span class="lines">@@ -250,7 +248,7 @@
</span><span class="cx"> 
</span><span class="cx"> void MemoryCache::removeImageFromCache(const URL&amp; url, const String&amp; domainForCachePartition)
</span><span class="cx"> {
</span><del>-    CachedResourceMap&amp; resources = getSessionMap(SessionID::defaultSessionID());
</del><ins>+    CachedResourceMap&amp; resources = sessionResources(SessionID::defaultSessionID());
</ins><span class="cx"> #if ENABLE(CACHE_PARTITIONING)
</span><span class="cx">     CachedResource* resource;
</span><span class="cx">     if (CachedResourceItem* item = resources.get(url))
</span><span class="lines">@@ -417,7 +415,7 @@
</span><span class="cx">     LOG(ResourceLoading, &quot;Evicting resource %p for '%s' from cache&quot;, resource, resource-&gt;url().string().latin1().data());
</span><span class="cx">     // The resource may have already been removed by someone other than our caller,
</span><span class="cx">     // who needed a fresh copy for a reload. See &lt;http://bugs.webkit.org/show_bug.cgi?id=12479#c6&gt;.
</span><del>-    CachedResourceMap&amp; resources = getSessionMap(resource-&gt;sessionID());
</del><ins>+    CachedResourceMap&amp; resources = sessionResources(resource-&gt;sessionID());
</ins><span class="cx">     if (resource-&gt;inCache()) {
</span><span class="cx">         // Remove from the resource map.
</span><span class="cx"> #if ENABLE(CACHE_PARTITIONING)
</span></span></pre></div>
<a id="trunkSourceWebCoreloadercacheMemoryCacheh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/loader/cache/MemoryCache.h (179402 => 179403)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/loader/cache/MemoryCache.h        2015-01-30 17:40:51 UTC (rev 179402)
+++ trunk/Source/WebCore/loader/cache/MemoryCache.h        2015-01-30 17:43:45 UTC (rev 179403)
</span><span class="lines">@@ -186,7 +186,7 @@
</span><span class="cx">     unsigned deadCapacity() const;
</span><span class="cx"> 
</span><span class="cx">     CachedResource* resourceForRequestImpl(const ResourceRequest&amp;, CachedResourceMap&amp;);
</span><del>-    CachedResourceMap&amp; getSessionMap(SessionID);
</del><ins>+    CachedResourceMap&amp; sessionResources(SessionID);
</ins><span class="cx"> 
</span><span class="cx">     bool m_disabled;  // Whether or not the cache is enabled.
</span><span class="cx">     bool m_inPruneResources;
</span></span></pre>
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