1dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen// Copyright (c) 2011 The Chromium Authors. All rights reserved. 2dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen// Use of this source code is governed by a BSD-style license that can be 3dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen// found in the LICENSE file. 4dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 5dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen#ifndef WEBKIT_GLUE_WEBKIT_CONSTANTS_H_ 6dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen#define WEBKIT_GLUE_WEBKIT_CONSTANTS_H_ 7dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 8dc0f95d653279beabeb9817299e2902918ba123eKristian Monsennamespace webkit_glue { 9dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 10dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen// Chromium sets the minimum interval timeout to 4ms, overriding the 11dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen// default of 10ms. We'd like to go lower, however there are poorly 12dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen// coded websites out there which do create CPU-spinning loops. Using 13dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen// 4ms prevents the CPU from spinning too busily and provides a balance 14dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen// between CPU spinning and the smallest possible interval timer. 15dc0f95d653279beabeb9817299e2902918ba123eKristian Monsenconst double kForegroundTabTimerInterval = 0.004; 16dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 17dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen// Provides control over the minimum timer interval for background tabs. 18dc0f95d653279beabeb9817299e2902918ba123eKristian Monsenconst double kBackgroundTabTimerInterval = 1.0; 19dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 20dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen} // namespace webkit_glue 21dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 22dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen#endif // WEBKIT_GLUE_WEBKIT_CONSTANTS_H_ 23