tools/perf/benchmarks/jetstream.py

   1 # Copyright 2014 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 """Runs Apple's JetStream benchmark.
   6
   7 JetStream combines a variety of JavaScript benchmarks, covering a variety of
   8 advanced workloads and programming techniques, and reports a single score that
   9 balances them using geometric mean.
  10
  11 Each benchmark measures a distinct workload, and no single optimization
  12 technique is sufficient to speed up all benchmarks. Latency tests measure that
  13 a web application can start up quickly, ramp up to peak performance quickly,
  14 and run smoothly without interruptions. Throughput tests measure the sustained
  15 peak performance of a web application, ignoring ramp-up time and spikes in
  16 smoothness. Some benchmarks demonstrate tradeoffs, and aggressive or
  17 specialized optimization for one benchmark might make another benchmark slower.
  18 """
  19
  20 import json
  21 import os
  22
  23 from telemetry import benchmark
  24 from telemetry import page as page_module
  25 from telemetry.page import page_set
  26 from telemetry.page import page_test
  27 from telemetry.util import statistics
  28 from telemetry.value import list_of_scalar_values
  29
  30
  31 class _JetstreamMeasurement(page_test.PageTest):
  32   def __init__(self):
  33     super(_JetstreamMeasurement, self).__init__()
  34
  35   def WillNavigateToPage(self, page, tab):
  36     page.script_to_evaluate_on_commit = """
  37         var __results = [];
  38         var __real_log = window.console.log;
  39         window.console.log = function() {
  40           __results.push(Array.prototype.join.call(arguments, ' '));
  41           __real_log.apply(this, arguments);
  42         }
  43         """
  44
  45   def ValidateAndMeasurePage(self, page, tab, results):
  46     get_results_js = """
  47         (function() {
  48           for (var i = 0; i < __results.length; i++) {
  49             if (!__results[i].indexOf('Raw results: ')) return __results[i];
  50           }
  51           return null;
  52         })();
  53         """
  54
  55     tab.WaitForDocumentReadyStateToBeComplete()
  56     tab.EvaluateJavaScript('JetStream.start()')
  57     tab.WaitForJavaScriptExpression(get_results_js, 600)
  58
  59     result = tab.EvaluateJavaScript(get_results_js)
  60     result = json.loads(result.partition(': ')[2])
  61
  62     all_score_lists = []
  63     for k, v in result.iteritems():
  64       results.AddValue(list_of_scalar_values.ListOfScalarValues(
  65           results.current_page, k.replace('.', '_'), 'score', v['result'],
  66           important=False))
  67       # Collect all test scores to compute geometric mean.
  68       for i, score in enumerate(v['result']):
  69         if len(all_score_lists) <= i:
  70           all_score_lists.append([])
  71         all_score_lists[i].append(score)
  72     all_scores = []
  73     for score_list in all_score_lists:
  74       all_scores.append(statistics.GeometricMean(score_list))
  75     results.AddSummaryValue(list_of_scalar_values.ListOfScalarValues(
  76         None, 'Score', 'score', all_scores))
  77
  78
  79 @benchmark.Disabled('android', 'xp')  # crbug.com/381742
  80 class Jetstream(benchmark.Benchmark):
  81   test = _JetstreamMeasurement
  82
  83   @classmethod
  84   def Name(cls):
  85     return 'jetstream'
  86
  87   def CreatePageSet(self, options):
  88     ps = page_set.PageSet(
  89         archive_data_file='../page_sets/data/jetstream.json',
  90         file_path=os.path.abspath(__file__),
  91         bucket=page_set.INTERNAL_BUCKET)
  92     ps.AddUserStory(page_module.Page(
  93         'http://browserbench.org/JetStream/', ps, ps.base_dir,
  94         make_javascript_deterministic=False))
  95     return ps