Add lint timing information to the status pages

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:async';
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/analysis_server.dart';
@@ skipping 13 matching lines @@
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/source/sdk_ext.dart';
 import 'package:analyzer/src/context/source.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
 import 'package:analyzer/src/dart/sdk/sdk.dart';
 import 'package:analyzer/src/generated/engine.dart' hide AnalysisResult;
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/utilities_general.dart';
+import 'package:analyzer/src/lint/linter.dart';
+import 'package:analyzer/src/lint/registry.dart';
+import 'package:analyzer/src/services/lint.dart';
 import 'package:plugin/plugin.dart';
 
 final String kCustomCss = '''
 .lead, .page-title+.markdown-body>p:first-child {
   margin-bottom: 30px;
   font-size: 20px;
   font-weight: 300;
   color: #555;
 }
 
@@ skipping 1006 matching lines @@
       double percent = tag.elapsedMs / totalTime;
       _writeRow([
         tag.label,
         printMilliseconds(tag.elapsedMs),
         printPercentage(percent)
       ]);
     }
 
     tags.forEach(writeRow);
     buf.write('</table>');
+
+    List<LintRule> rules = Registry.ruleRegistry.rules.toList();
+    rules.sort((first, second) {
+      int firstTime = lintRegistry.getTimer(first).elapsedMilliseconds;
+      int secondTime = lintRegistry.getTimer(second).elapsedMilliseconds;
+      if (firstTime == secondTime) {
+        return first.lintCode.name.compareTo(second.lintCode.name);
+      }
+      return secondTime - firstTime;
+    });
+    p('Lint rule timings');
+    buf.write('<table>');
+    _writeRow(['Lint code', 'Time (in ms)'], header: true);
+    int totalLintTime = 0;
+    for (var rule in rules) {
+      int time = lintRegistry.getTimer(rule).elapsedMilliseconds;
+      totalLintTime += time;
+      _writeRow([rule.lintCode.name, time.toString()]);
+    }
+    buf.write('</table>');
+    p('Total time spent in lints: $totalLintTime ms');
   }
 }
 
 class StatusPage extends DiagnosticPageWithNav {
   StatusPage(DiagnosticsSite site)
       : super(site, 'status', 'Status',
             description:
                 'General status and diagnostics for the analysis server.');
 
   @override
@@ skipping 57 matching lines @@
     h3('Execution domain');
     ul(ExecutionService.VALUES, (item) {
       if (domain.onFileAnalyzed != null) {
         buf.write('$item (has subscriptions)');
       } else {
         buf.write('$item (no subscriptions)');
       }
     });
   }
 }