skia2/bench/ControlBench.cpp

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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Benchmark.h"
// This benchmark's runtime should be fairly constant for a given machine,
// so it can be used as a baseline to control for thermal or other throttling.
struct ControlBench : public Benchmark {
const char* onGetName() override { return "control"; }
bool isSuitableFor(Backend backend) override { return backend == kNonRendering_Backend; }
void onDraw(int loops, SkCanvas*) override {
// Nothing terribly useful: force a memory read, a memory write, and some math.
volatile uint32_t rand = 0;
for (int i = 0; i < 1000*loops; i++) {
rand *= 1664525;
rand += 1013904223;
}
}
};
DEF_BENCH(return new ControlBench;)