Delete tools/telemetry.

tools/telemetry/telemetry/web_perf/metrics/mainthread_jank_stats.py

-# Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-
-# A top level slice of a main thread can cause the webapp to behave
-# unresponsively if its thread duration is greater than or equals to
-# USER_PERCEIVABLE_DELAY_THRESHOLD_MS. Human eyes can perceive delay at low as
-# 100ms, but since we use thread time instead of wall-time, we reduce the
-# threshold further to 50ms to make room for other OS's activities.
-USER_PERCEIVABLE_DELAY_THRESHOLD_MS = 50
-
-
-class _MainthreadJankStat(object):
-  """A small wrapper class for storing mainthread jank stats computed for
-  single record.
-  """
-
-  def __init__(self):
-    self.sum_big_top_slices_thread_time = 0
-    self.biggest_top_slice_thread_time = 0
-
-
-def _ComputeMainthreadJankStatsForRecord(renderer_thread, record):
-  """Computes the mainthread jank stat on a record range.
-
-  Returns:
-      An instance of _MainthreadJankStat, which has:
-
-      sum_big_top_slices_thread_time is the total thread duration of all top
-      slices whose thread time ranges overlapped with (thread_start, thread_end)
-      and the overlapped thread duration is greater than or equal
-      USER_PERCEIVABLE_DELAY_THRESHOLD_MS.
-
-      biggest_top_slice_thread_time is the biggest thread duration of all
-      top slices whose thread time ranges overlapped with
-      (thread_start, thread_end).
-
-      Note: thread duration of each slices is computed using overlapped range
-      with (thread_start, thread_end).
-  """
-  stat = _MainthreadJankStat()
-  for s in renderer_thread.toplevel_slices:
-    jank_thread_duration = record.GetOverlappedThreadTimeForSlice(s)
-    stat.biggest_top_slice_thread_time = max(
-        stat.biggest_top_slice_thread_time, jank_thread_duration)
-    if jank_thread_duration >= USER_PERCEIVABLE_DELAY_THRESHOLD_MS:
-      stat.sum_big_top_slices_thread_time += jank_thread_duration
-  return stat
-
-
-class MainthreadJankStats(object):
-  """
-    Utility class for extracting main thread jank statistics from the timeline
-    (or other loggin facilities), and providing them in a common format to
-    classes that compute benchmark metrics from this data.
-
-      total_big_jank_thread_time is the total thread duration of all top
-      slices whose thread time ranges overlapped with any thread time ranges of
-      the records and the overlapped thread duration is greater than or equal
-      USER_PERCEIVABLE_DELAY_THRESHOLD_MS.
-
-      biggest_jank_thread_time is the biggest thread duration of all
-      top slices whose thread time ranges overlapped with any of records' thread
-      time ranges.
-  """
-
-  def __init__(self, renderer_thread, interaction_records):
-    self._renderer_thread = renderer_thread
-    self._interaction_records = interaction_records
-    self._total_big_jank_thread_time = 0
-    self._biggest_jank_thread_time = 0
-    self._ComputeMainthreadJankStats()
-
-  @property
-  def total_big_jank_thread_time(self):
-    return self._total_big_jank_thread_time
-
-  @property
-  def biggest_jank_thread_time(self):
-    return self._biggest_jank_thread_time
-
-  def _ComputeMainthreadJankStats(self):
-    for record in self._interaction_records:
-      record_jank_stat = _ComputeMainthreadJankStatsForRecord(
-          self._renderer_thread, record)
-      self._total_big_jank_thread_time += (
-          record_jank_stat.sum_big_top_slices_thread_time)
-      self._biggest_jank_thread_time = (
-          max(self._biggest_jank_thread_time,
-              record_jank_stat.biggest_top_slice_thread_time))