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This requires replacing inclusions of it with inclusions of more specific prefs files. The exception is that StaticPrefsAll.h, which is equivalent to StaticPrefs.h, and is used in `Codegen.py` because doing something smarter is tricky and suitable for a follow-up. As a result, any change to StaticPrefList.yaml will still trigger recompilation of all the generated DOM bindings files, but that's still a big improvement over trigger recompilation of every file that uses static prefs. Most of the changes in this commit are very boring. The only changes that are not boring are modules/libpref/*, Codegen.py, and ServoBindings.toml. Differential Revision: https://phabricator.services.mozilla.com/D39138 --HG-- extra : moz-landing-system : lando
72 lines
2.7 KiB
C++
72 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "MainThreadIdlePeriod.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/StaticPrefs_idle_period.h"
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#include "mozilla/dom/Document.h"
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#include "nsRefreshDriver.h"
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#include "nsThreadUtils.h"
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// The amount of idle time (milliseconds) reserved for a long idle period.
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static const double kLongIdlePeriodMS = 50.0;
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// The minimum amount of time (milliseconds) required for an idle period to be
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// scheduled on the main thread. N.B. layout.idle_period.time_limit adds
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// padding at the end of the idle period, which makes the point in time that we
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// expect to become busy again be:
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// now + idle_period.min + layout.idle_period.time_limit
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// or during page load
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// now + idle_period.during_page_load.min + layout.idle_period.time_limit
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static const uint32_t kMaxTimerThreadBound = 5; // milliseconds
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static const uint32_t kMaxTimerThreadBoundClamp = 15; // milliseconds
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namespace mozilla {
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NS_IMETHODIMP
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MainThreadIdlePeriod::GetIdlePeriodHint(TimeStamp* aIdleDeadline) {
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MOZ_ASSERT(NS_IsMainThread());
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MOZ_ASSERT(aIdleDeadline);
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TimeStamp now = TimeStamp::Now();
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TimeStamp currentGuess =
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now + TimeDuration::FromMilliseconds(kLongIdlePeriodMS);
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currentGuess = nsRefreshDriver::GetIdleDeadlineHint(currentGuess);
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currentGuess = NS_GetTimerDeadlineHintOnCurrentThread(currentGuess,
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kMaxTimerThreadBound);
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// If the idle period is too small, then just return a null time
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// to indicate we are busy. Otherwise return the actual deadline.
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TimeDuration minIdlePeriod =
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TimeDuration::FromMilliseconds(StaticPrefs::idle_period_min());
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bool busySoon = currentGuess.IsNull() ||
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(now >= (currentGuess - minIdlePeriod)) ||
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currentGuess < mLastIdleDeadline;
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// During page load use higher minimum idle period.
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if (!busySoon && XRE_IsContentProcess() &&
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mozilla::dom::Document::HasRecentlyStartedForegroundLoads()) {
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TimeDuration minIdlePeriod = TimeDuration::FromMilliseconds(
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StaticPrefs::idle_period_during_page_load_min());
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busySoon = (now >= (currentGuess - minIdlePeriod));
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}
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if (!busySoon) {
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*aIdleDeadline = mLastIdleDeadline = currentGuess;
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}
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return NS_OK;
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}
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/* static */
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float MainThreadIdlePeriod::GetLongIdlePeriod() { return kLongIdlePeriodMS; }
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} // namespace mozilla
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