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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/212729">212729</a></dd>
<dt>Author</dt> <dd>ap@apple.com</dd>
<dt>Date</dt> <dd>2017-02-21 11:11:27 -0800 (Tue, 21 Feb 2017)</dd>
</dl>

<h3>Log Message</h3>
<pre>Improve bot watcher's dashboard performance
https://bugs.webkit.org/show_bug.cgi?id=168624
&lt;rdar://problem/30190109&gt;

Reviewed by Daniel Bates.

* BuildSlaveSupport/build.webkit.org-config/public_html/dashboard/Scripts/Trac.js:
There was an unnecessary linear complexity algorithm in indexOfRevision().</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkToolsBuildSlaveSupportbuildwebkitorgconfigpublic_htmldashboardScriptsTracjs">trunk/Tools/BuildSlaveSupport/build.webkit.org-config/public_html/dashboard/Scripts/Trac.js</a></li>
<li><a href="#trunkToolsChangeLog">trunk/Tools/ChangeLog</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkToolsBuildSlaveSupportbuildwebkitorgconfigpublic_htmldashboardScriptsTracjs"></a>
<div class="modfile"><h4>Modified: trunk/Tools/BuildSlaveSupport/build.webkit.org-config/public_html/dashboard/Scripts/Trac.js (212728 => 212729)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Tools/BuildSlaveSupport/build.webkit.org-config/public_html/dashboard/Scripts/Trac.js        2017-02-21 19:07:17 UTC (rev 212728)
+++ trunk/Tools/BuildSlaveSupport/build.webkit.org-config/public_html/dashboard/Scripts/Trac.js        2017-02-21 19:11:27 UTC (rev 212729)
</span><span class="lines">@@ -37,6 +37,7 @@
</span><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     this.recordedCommits = []; // Will be sorted in ascending order.
</span><ins>+    this.recordedCommitIndicesByRevisionNumber = {};
</ins><span class="cx"> };
</span><span class="cx"> 
</span><span class="cx"> BaseObject.addConstructorFunctions(Trac);
</span><span class="lines">@@ -223,11 +224,6 @@
</span><span class="cx">         if (!dataDocument)
</span><span class="cx">             return;
</span><span class="cx"> 
</span><del>-        var recordedRevisionNumbers = this.recordedCommits.reduce(function(previousResult, commit) {
-            previousResult[commit.revisionNumber] = commit;
-            return previousResult;
-        }, {});
-
</del><span class="cx">         var knownCommitsWereUpdated = false;
</span><span class="cx">         var newCommits = [];
</span><span class="cx"> 
</span><span class="lines">@@ -235,11 +231,12 @@
</span><span class="cx">         var commitInfoElement;
</span><span class="cx">         while (commitInfoElement = commitInfoElements.iterateNext()) {
</span><span class="cx">             var commit = this._convertCommitInfoElementToObject(dataDocument, commitInfoElement);
</span><del>-            if (commit.revisionNumber in recordedRevisionNumbers) {
</del><ins>+            var knownCommitIndex = this.recordedCommitIndicesByRevisionNumber[commit.revisionNumber];
+            if (knownCommitIndex &gt;= 0) {
</ins><span class="cx">                 // Author could have changed, as commit queue replaces it after the fact.
</span><del>-                console.assert(recordedRevisionNumbers[commit.revisionNumber].revisionNumber === commit.revisionNumber);
-                if (recordedRevisionNumbers[commit.revisionNumber].author != commit.author) {
-                    recordedRevisionNumbers[commit.revisionNumber].author = commit.author;
</del><ins>+                console.assert(this.recordedCommits[knownCommitIndex].revisionNumber === commit.revisionNumber);
+                if (this.recordedCommits[knownCommitIndex].author != commit.author) {
+                    this.recordedCommits[knownCommitIndex].author = commit.author;
</ins><span class="cx">                     knownCommitWasUpdated = true;
</span><span class="cx">                 }
</span><span class="cx">             } else
</span><span class="lines">@@ -246,8 +243,13 @@
</span><span class="cx">                 newCommits.push(commit);
</span><span class="cx">         }
</span><span class="cx"> 
</span><del>-        if (newCommits.length)
</del><ins>+        if (newCommits.length) {
</ins><span class="cx">             this.recordedCommits = newCommits.concat(this.recordedCommits).sort(function(a, b) { return a.date - b.date; });
</span><ins>+            this.recordedCommitIndicesByRevisionNumber = {};
+            this.recordedCommits.forEach(function(curentValue, index) {
+                this.recordedCommitIndicesByRevisionNumber[curentValue.revisionNumber] = index;
+            }, this);
+        }
</ins><span class="cx"> 
</span><span class="cx">         if (newCommits.length || knownCommitsWereUpdated)
</span><span class="cx">             this.dispatchEventToListeners(Trac.Event.CommitsUpdated, null);
</span><span class="lines">@@ -318,13 +320,12 @@
</span><span class="cx">         return Trac.NO_MORE_REVISIONS;
</span><span class="cx">     },
</span><span class="cx"> 
</span><del>-    indexOfRevision: function(revision)
</del><ins>+    indexOfRevision: function(revisionNumber)
</ins><span class="cx">     {
</span><del>-        var commits = this.recordedCommits;
-        for (var i = 0; i &lt; commits.length; ++i) {
-            if (commits[i].revisionNumber === revision)
-                return i;
-        }
-        return -1;
</del><ins>+        var result = this.recordedCommitIndicesByRevisionNumber[revisionNumber];
+        // FIXME: Update callers to handle undefined result.
+        if (result === undefined)
+            return -1;
+        return result;
</ins><span class="cx">     },
</span><span class="cx"> };
</span></span></pre></div>
<a id="trunkToolsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Tools/ChangeLog (212728 => 212729)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Tools/ChangeLog        2017-02-21 19:07:17 UTC (rev 212728)
+++ trunk/Tools/ChangeLog        2017-02-21 19:11:27 UTC (rev 212729)
</span><span class="lines">@@ -1,3 +1,14 @@
</span><ins>+2017-02-21  Alexey Proskuryakov  &lt;ap@apple.com&gt;
+
+        Improve bot watcher's dashboard performance
+        https://bugs.webkit.org/show_bug.cgi?id=168624
+        &lt;rdar://problem/30190109&gt;
+
+        Reviewed by Daniel Bates.
+
+        * BuildSlaveSupport/build.webkit.org-config/public_html/dashboard/Scripts/Trac.js:
+        There was an unnecessary linear complexity algorithm in indexOfRevision().
+
</ins><span class="cx"> 2017-02-21  Alex Christensen  &lt;achristensen@webkit.org&gt;
</span><span class="cx"> 
</span><span class="cx">         Unreviewed, rolling out r212699.
</span></span></pre>
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