update the analyzer and analysis server perf tags

pkg/analysis_server/lib/src/status/diagnostics.dart

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/domain_completion.dart';
@@ skipping 21 matching lines @@
 .lead, .page-title+.markdown-body>p:first-child {
   margin-bottom: 30px;
   font-size: 20px;
   font-weight: 300;
   color: #555;
 }
 
 .container {
   width: 1160px;
 }
-    
+
 .masthead {
   padding-top: 1rem;
   padding-bottom: 1rem;
   margin-bottom: 1.5rem;
   text-align: center;
   background-color: #4078c0;
 }
 
 .masthead .masthead-logo {
   display: inline-block;
@@ skipping 33 matching lines @@
   font-weight: bold;
   line-height: 1;
   color: #666;
   background-color: #eee;
   border-radius: 20px;
 }
 
 .menu-item .counter {
   float: right;
   margin-left: 5px;
-}    
-    
+}
+
 td.right {
   text-align: right;
 }
 
 td.pre {
   white-space: pre;
 }
 
 .nowrap {
   white-space: nowrap;
@@ skipping 124 matching lines @@
     buf.writeln('</div>');
     buf.writeln('</div>');
   }
 
   void generateContent(Map<String, String> params);
 
   void generateFooter() {
     buf.writeln('''
     <footer class="footer">
       Dart ${site.title} <span style="float:right">SDK ${_sdkVersion}</span>
-    </footer>    
+    </footer>
 ''');
   }
 
   bool get isNavPage => false;
 }
 
 abstract class DiagnosticPageWithNav extends DiagnosticPage {
   DiagnosticPageWithNav(Site site, String id, String title,
       {String description})
       : super(site, id, title, description: description);
@@ skipping 172 matching lines @@
 class ProfilePage extends DiagnosticPageWithNav {
   ProfilePage(DiagnosticsSite site)
       : super(site, 'profile', 'Profiling Info',
             description: 'Profiling performance tag data.');
 
   @override
   void generateContent(Map<String, String> params) {
     // prepare sorted tags
     List<PerformanceTag> tags = PerformanceTag.all.toList();
     tags.remove(ServerPerformanceStatistics.idle);
-    tags.remove(PerformanceTag.UNKNOWN);
+    tags.remove(PerformanceTag.unknown);
+    tags.removeWhere((tag) => tag.elapsedMs == 0);
     tags.sort((a, b) => b.elapsedMs - a.elapsedMs);
 
     // draw a pie chart
     String rowData =
         tags.map((tag) => "['${tag.label}', ${tag.elapsedMs}]").join(',');
     buf.writeln(
         '<div id="chart-div" style="width: 700px; height: 300px;"></div>');
     buf.writeln('''
       <script type="text/javascript">
         google.charts.load('current', {'packages':['corechart']});
         google.charts.setOnLoadCallback(drawChart);
-  
+
         function drawChart() {
           var data = new google.visualization.DataTable();
           data.addColumn('string', 'Tag');
           data.addColumn('number', 'Time (ms)');
           data.addRows([$rowData]);
           var options = {'title': 'Performance Tag Data', 'width': 700, 'height': 300};
           var chart = new google.visualization.PieChart(document.getElementById('chart-div'));
           chart.draw(data, options);
         }
-      </script>    
+      </script>
 ''');
 
     // print total time
     int totalTime =
         tags.fold<int>(0, (int a, PerformanceTag tag) => a + tag.elapsedMs);
     p('Total measured time: ${printMilliseconds(totalTime)}');
 
     // write out a table
     void _writeRow(List<String> data, {bool header: false}) {
       buf.write('<tr>');
@@ skipping 374 matching lines @@
       google.charts.setOnLoadCallback(drawChart);
       function drawChart() {
         var data = google.visualization.arrayToDataTable([
           ['Completions', 'Time'],
           $rowData
         ]);
         var options = { bars: 'vertical', vAxis: {format: 'decimal'}, height: 300 };
         var chart = new google.charts.Bar(document.getElementById('chart-div'));
         chart.draw(data, google.charts.Bar.convertOptions(options));
       }
-      </script>    
+      </script>
 ''');
 
     // emit the data as a table
     buf.writeln('<table>');
     buf.writeln(
         '<tr><th>Time</th><th>Results</th><th>Source</th><th>Snippet</th></tr>');
     for (CompletionPerformance completion in completions) {
       buf.writeln('<tr>'
           '<td class="pre right">${printMilliseconds(completion.elapsedInMilliseconds)}</td>'
           '<td class="right">${completion.suggestionCount}</td>'
@@ skipping 99 matching lines @@
   return '$name: <code>$value</code><br> ';
 }
 
 String get _sdkVersion {
   String version = Platform.version;
   if (version.contains(' ')) {
     version = version.substring(0, version.indexOf(' '));
   }
   return version;
 }