1-- 2-- Copyright 2020 The Android Open Source Project 3-- 4-- Licensed under the Apache License, Version 2.0 (the "License"); 5-- you may not use this file except in compliance with the License. 6-- You may obtain a copy of the License at 7-- 8-- https://www.apache.org/licenses/LICENSE-2.0 9-- 10-- Unless required by applicable law or agreed to in writing, software 11-- distributed under the License is distributed on an "AS IS" BASIS, 12-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13-- See the License for the specific language governing permissions and 14-- limitations under the License. 15-- 16-- A collection of metrics related to GestureScrollUpdate events. 17-- 18-- We define a GestureScrollUpdate to be janky if comparing forwards or 19-- backwards (ignoring coalesced updates) a given GestureScrollUpdate exceeds 20-- the duration of its predecessor or successor by 50% of a vsync interval 21-- (defaulted to 60 FPS). 22-- 23-- WARNING: This metric should not be used as a source of truth. It is under 24-- active development and the values & meaning might change without 25-- notice. 26 27SELECT RUN_METRIC( 28 'chrome/gesture_jank.sql', 29 'prefix', 'scroll', 30 'gesture_start', 'GestureScrollBegin', 31 'gesture_update', 'GestureScrollUpdate', 32 'gesture_end', 'GestureScrollEnd', 33 'id_field', 'gesture_scroll_id', 34 'proto_name', 'ScrollJank'); 35