Revert of Make canceling Timers fast.

third_party/WebKit/Source/web/tests/TimerPerfTest.cpp

-
-// Copyright 2016 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.
-
-#include "platform/Timer.h"
-
-#include "platform/testing/UnitTestHelpers.h"
-#include "public/platform/Platform.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "wtf/PtrUtil.h"
-#include "wtf/Vector.h"
-
-namespace blink {
-
-class TimerPerfTest : public ::testing::Test {
-public:
-    void nopTask(TimerBase*)
-    {
-    }
-
-    void recordStartRunTime(TimerBase*)
-    {
-        m_runStart = base::ThreadTicks::Now();
-    }
-
-    void recordEndRunTime(TimerBase*)
-    {
-        m_runEnd = base::ThreadTicks::Now();
-        base::MessageLoop::current()->QuitNow();
-    }
-
-    base::ThreadTicks m_runStart;
-    base::ThreadTicks m_runEnd;
-};
-
-TEST_F(TimerPerfTest, PostAndRunTimers)
-{
-    const int numIterations = 10000;
-    Vector<std::unique_ptr<Timer<TimerPerfTest>>> timers(numIterations);
-    for (int i = 0; i < numIterations; i++) {
-        timers[i].reset(new Timer<TimerPerfTest>(this, &TimerPerfTest::nopTask));
-    }
-
-    Timer<TimerPerfTest> measureRunStart(this, &TimerPerfTest::recordStartRunTime);
-    Timer<TimerPerfTest> measureRunEnd(this, &TimerPerfTest::recordEndRunTime);
-
-    measureRunStart.startOneShot(0.0, BLINK_FROM_HERE);
-    base::ThreadTicks postStart = base::ThreadTicks::Now();
-    for (int i = 0; i < numIterations; i++) {
-        timers[i]->startOneShot(0.0, BLINK_FROM_HERE);
-    }
-    base::ThreadTicks postEnd = base::ThreadTicks::Now();
-    measureRunEnd.startOneShot(0.0, BLINK_FROM_HERE);
-
-    testing::enterRunLoop();
-
-    double postingTime = (postEnd - postStart).InMicroseconds();
-    double postingTimeUsPerCall = postingTime / static_cast<double>(numIterations);
-    LOG(INFO) << "TimerBase::startOneShot cost (us/call) " << postingTimeUsPerCall << " (total " << postingTime << " us)";
-    LOG(INFO) << "Time to run " << numIterations << " trivial tasks (us) " << (m_runEnd - m_runStart).InMicroseconds();
-}
-
-TEST_F(TimerPerfTest, PostThenCancelTenThousandTimers)
-{
-    const int numIterations = 10000;
-    Vector<std::unique_ptr<Timer<TimerPerfTest>>> timers(numIterations);
-    for (int i = 0; i < numIterations; i++) {
-        timers[i].reset(new Timer<TimerPerfTest>(this, &TimerPerfTest::nopTask));
-    }
-
-    Timer<TimerPerfTest> measureRunStart(this, &TimerPerfTest::recordStartRunTime);
-    Timer<TimerPerfTest> measureRunEnd(this, &TimerPerfTest::recordEndRunTime);
-
-    measureRunStart.startOneShot(0.0, BLINK_FROM_HERE);
-    base::ThreadTicks postStart = base::ThreadTicks::Now();
-    for (int i = 0; i < numIterations; i++) {
-        timers[i]->startOneShot(0.0, BLINK_FROM_HERE);
-    }
-    base::ThreadTicks postEnd = base::ThreadTicks::Now();
-    measureRunEnd.startOneShot(0.0, BLINK_FROM_HERE);
-
-    base::ThreadTicks cancelStart = base::ThreadTicks::Now();
-    for (int i = 0; i < numIterations; i++) {
-        timers[i]->stop();
-    }
-    base::ThreadTicks cancelEnd = base::ThreadTicks::Now();
-
-    testing::enterRunLoop();
-
-    double postingTime = (postEnd - postStart).InMicroseconds();
-    double postingTimeUsPerCall = postingTime / static_cast<double>(numIterations);
-    LOG(INFO) << "TimerBase::startOneShot cost (us/call) " << postingTimeUsPerCall << " (total " << postingTime << " us)";
-
-    double cancelTime = (cancelEnd - cancelStart).InMicroseconds();
-    double cancelTimeUsPerCall = cancelTime / static_cast<double>(numIterations);
-    LOG(INFO) << "TimerBase::stop cost (us/call) " << cancelTimeUsPerCall << " (total " << cancelTime << " us)";
-    LOG(INFO) << "Time to run " << numIterations << " canceled tasks (us) " << (m_runEnd - m_runStart).InMicroseconds();
-}
-
-} // namespace blink