Converted Observatory heap-profile element

runtime/observatory/lib/utils.dart

 // Copyright (c) 2014, 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.
 
 library utils;
 
 import 'dart:async';
 import 'dart:math';
 
 class Utils {
@@ skipping 128 matching lines @@
     return '${now.year}-${now.month}-${now.day} '
            '${now.hour.toString().padLeft(2)}:'
            '${now.minute.toString().padLeft(2)}:'
            '${now.second.toString().padLeft(2)}';
   }
 
   static String formatSeconds(double x) {
     return x.toStringAsFixed(2);
   }
 
-  static String formatDurationInSeconds(Duration x) {
-    return formatSeconds(x.inMilliseconds / Duration.MILLISECONDS_PER_SECOND);
+  static String formatMillis(double x) {
+    return x.toStringAsFixed(2);
   }
 
+  static String formatDurationInSeconds(Duration x) =>
+    formatSeconds(x.inMicroseconds / Duration.MICROSECONDS_PER_SECOND);
+
+  static String formatDurationInMilliseconds(Duration x) =>
+    formatMillis(x.inMicroseconds / Duration.MICROSECONDS_PER_MILLISECOND);
+
   static bool runningInJavaScript() => identical(1.0, 1);
 }
 
 /// A [Task] that can be scheduled on the Dart event queue.
 class Task {
   Timer _timer;
   final Function callback;
 
   Task(this.callback);
 
   /// Queue [this] to run on the next Dart event queue pump. Does nothing
   /// if [this] is already queued.
   queue() {
     if (_timer != null) {
       // Already scheduled.
       return;
     }
     _timer = new Timer(Duration.ZERO, () {
      _timer = null;
      callback();
     });
   }
 }