1 # Copyright 2013 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 from metrics import startup_metric 6 from telemetry.page import page_test 7 8 9 class Startup(page_test.PageTest): 10 """Performs a measurement of Chromium's startup performance. 11 12 This test must be invoked with either --warm or --cold on the command line. A 13 cold start means none of the Chromium files are in the disk cache. A warm 14 start assumes the OS has already cached much of Chromium's content. For warm 15 tests, you should repeat the page set to ensure it's cached. 16 """ 17 18 def __init__(self, action_name_to_run = ''): 19 super(Startup, self).__init__(needs_browser_restart_after_each_page=True, 20 action_name_to_run=action_name_to_run) 21 22 @classmethod 23 def AddCommandLineArgs(cls, parser): 24 parser.add_option('--cold', action='store_true', 25 help='Clear the OS disk cache before performing the test') 26 parser.add_option('--warm', action='store_true', 27 help='Start up with everything already cached') 28 29 @classmethod 30 def ProcessCommandLineArgs(cls, parser, args): 31 cls._cold = args.cold 32 # TODO: Once the bots start running benchmarks, enforce that either --warm 33 # or --cold is explicitly specified. 34 # if args.warm == args.cold: 35 # parser.error('You must specify either --warm or --cold') 36 37 def CustomizeBrowserOptions(self, options): 38 if self._cold: 39 options.clear_sytem_cache_for_browser_and_profile_on_start = True 40 else: 41 self.discard_first_result = True 42 43 options.AppendExtraBrowserArgs([ 44 '--enable-stats-collection-bindings' 45 ]) 46 47 def RunNavigateSteps(self, page, tab): 48 # Overriden so that no page navigation occurs - startup to the NTP. 49 pass 50 51 def ValidateAndMeasurePage(self, page, tab, results): 52 startup_metric.StartupMetric().AddResults(tab, results) 53 54 55 class StartWithUrl(Startup): 56 """Performs a measurement of Chromium's performance starting with a URL. 57 58 This test must be invoked with either --warm or --cold on the command line. A 59 cold start means none of the Chromium files are in the disk cache. A warm 60 start assumes the OS has already cached much of Chromium's content. For warm 61 tests, you should repeat the page set to ensure it's cached. 62 63 The startup URL is taken from the page set's startup_url. This 64 allows the testing of multiple different URLs in a single benchmark. 65 """ 66 67 def __init__(self): 68 super(StartWithUrl, self).__init__(action_name_to_run='RunNavigateSteps') 69