Implement a better dashboard for running benchmarks

benchmark/lib/benchmark.dart

 // Copyright (c) 2015, 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 protoc.benchmark;
 
 import 'generated/benchmark.pb.dart' as pb;
 
 typedef Benchmark CreateBenchmarkFunc(pb.Request request);
 
 // Describes how to construct a benchmark.
 class BenchmarkType {
   final pb.BenchmarkID id;
   final CreateBenchmarkFunc create;
   const BenchmarkType(this.id, this.create);
 }
 
 /// A benchmark that also reports the counts for various operations.
 /// (A modification of BenchmarkBase from the benchmark_harness library.)
 abstract class Benchmark {
   static const int _DEFAULT_REPS = 10;
 
   final pb.BenchmarkID id;
   Benchmark(this.id);
 
   String get summary => id.name;
 
   pb.Request makeRequest(
-          [Duration duration = const Duration(seconds: 1), int samples = 3]) =>
+          [Duration duration = const Duration(milliseconds: 50),
+          int samples = 20]) =>
       new pb.Request()
         ..id = id
         ..params = makeParams()
         ..duration = duration.inMilliseconds
         ..samples = samples;
 
   pb.Params makeParams();
 
   /// Runs a benchmark for the requested number of times.
   ///
   /// The length of each iterator is the number of samples
   /// requested. If you create more than one iterator, each
   /// iterator runs benchmarks independently and will return
   /// different samples.
-  Iterable<pb.Sample> measure(pb.Request r) sync* {
+  Iterable<pb.Sample> measure(pb.Request r, int samples) sync* {
     if (r.id != id) {
       throw new ArgumentError("invalid benchmark id: ${r.id}");
     }
     if (r.params != makeParams()) {
       throw new ArgumentError("parameters don't match: ${r.params}");
     }
 
     int sampleMillis = r.duration;
-    int samples = r.samples;
     setup();
 
     for (int i = 0; i < samples; i++) {
       yield _measureOnce(sampleMillis);
     }
     teardown();
   }
 
   pb.Sample _measureOnce(int sampleMillis) {
     // Warmup for at least 100ms. Discard result.
@@ skipping 51 matching lines @@
     while (elapsed < minimumMicros) {
       reps += runner();
       elapsed = watch.elapsedMicroseconds;
     }
     return new pb.Sample()
       ..duration = elapsed
       ..loopCount = reps
       ..counts = new pb.Counts();
   }
 }