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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/test_kit.h>
#include <vespa/fnet/fnet.h>
class DummyTime
{
public:
void SetNow() {}
};
TEST("time speed") {
FastOS_Time start;
FastOS_Time stop;
DummyTime dummy;
FastOS_Time now;
double dummyTime;
double actualTime;
double overhead;
uint32_t i;
start.SetNow();
for (i = 0; i < 100000; i++) {
dummy.SetNow();
dummy.SetNow();
dummy.SetNow();
dummy.SetNow();
dummy.SetNow();
dummy.SetNow();
dummy.SetNow();
dummy.SetNow();
dummy.SetNow();
dummy.SetNow();
}
stop.SetNow();
stop -= start;
dummyTime = stop.MilliSecs();
fprintf(stderr, "1M dummy SetNow: %f ms (%1.2f/ms)\n",
dummyTime, 1000000.0 / dummyTime);
start.SetNow();
for (i = 0; i < 100000; i++) {
now.SetNow();
now.SetNow();
now.SetNow();
now.SetNow();
now.SetNow();
now.SetNow();
now.SetNow();
now.SetNow();
now.SetNow();
now.SetNow();
}
stop.SetNow();
stop -= start;
actualTime = stop.MilliSecs();
fprintf(stderr, "1M actual SetNow: %f ms (%1.2f/ms)\n",
stop.MilliSecs(), 1000000.0 / stop.MilliSecs());
overhead = (actualTime - dummyTime) / 1000.0;
fprintf(stderr, "approx overhead per SetNow: %f microseconds\n", overhead);
}
TEST_MAIN() { TEST_RUN_ALL(); }
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