/**
* Time a multi-threaded access to a cache.
*
* @return the timing stopwatch
*/
private <V> StopWatch timeMultiThreaded(
String id, final Map<Integer, V> map, ValueFactory<V> factory) throws InterruptedException {
StopWatch stopWatch = new StopWatch(id);
for (int i = 0; i < 500; i++) {
map.put(i, factory.newValue(i));
}
Thread[] threads = new Thread[30];
stopWatch.start("Running threads");
for (int threadIndex = 0; threadIndex < threads.length; threadIndex++) {
threads[threadIndex] =
new Thread("Cache access thread " + threadIndex) {
@Override
public void run() {
for (int j = 0; j < 1000; j++) {
for (int i = 0; i < 1000; i++) {
map.get(i);
}
}
}
};
}
for (Thread thread : threads) {
thread.start();
}
for (Thread thread : threads) {
if (thread.isAlive()) {
thread.join(2000);
}
}
stopWatch.stop();
return stopWatch;
}
@Test
public void getUniqueDeclaredMethods_isFastEnough() {
Assume.group(TestGroup.PERFORMANCE);
@SuppressWarnings("unused")
class C {
void m00() {}
void m01() {}
void m02() {}
void m03() {}
void m04() {}
void m05() {}
void m06() {}
void m07() {}
void m08() {}
void m09() {}
void m10() {}
void m11() {}
void m12() {}
void m13() {}
void m14() {}
void m15() {}
void m16() {}
void m17() {}
void m18() {}
void m19() {}
void m20() {}
void m21() {}
void m22() {}
void m23() {}
void m24() {}
void m25() {}
void m26() {}
void m27() {}
void m28() {}
void m29() {}
void m30() {}
void m31() {}
void m32() {}
void m33() {}
void m34() {}
void m35() {}
void m36() {}
void m37() {}
void m38() {}
void m39() {}
void m40() {}
void m41() {}
void m42() {}
void m43() {}
void m44() {}
void m45() {}
void m46() {}
void m47() {}
void m48() {}
void m49() {}
void m50() {}
void m51() {}
void m52() {}
void m53() {}
void m54() {}
void m55() {}
void m56() {}
void m57() {}
void m58() {}
void m59() {}
void m60() {}
void m61() {}
void m62() {}
void m63() {}
void m64() {}
void m65() {}
void m66() {}
void m67() {}
void m68() {}
void m69() {}
void m70() {}
void m71() {}
void m72() {}
void m73() {}
void m74() {}
void m75() {}
void m76() {}
void m77() {}
void m78() {}
void m79() {}
void m80() {}
void m81() {}
void m82() {}
void m83() {}
void m84() {}
void m85() {}
void m86() {}
void m87() {}
void m88() {}
void m89() {}
void m90() {}
void m91() {}
void m92() {}
void m93() {}
void m94() {}
void m95() {}
void m96() {}
void m97() {}
void m98() {}
void m99() {}
}
StopWatch sw = new StopWatch();
sw.start();
Method[] methods = ReflectionUtils.getUniqueDeclaredMethods(C.class);
sw.stop();
long totalMs = sw.getTotalTimeMillis();
assertThat(methods.length, Matchers.greaterThan(100));
assertThat(totalMs, Matchers.lessThan(10L));
}