jdeppe-pivotal commented on PR #7548:
URL: https://github.com/apache/geode/pull/7548#issuecomment-1087564124
@pivotal-jbarrett Here is the JMH setup I ran:
```
public class PerformanceSample {
@State(Scope.Thread)
public static class BenchmarkState {
List<Integer> list;
@Setup(Level.Trial)
public void initialize() {
Random rand = new Random();
list = new ArrayList<>();
for (int i = 0; i < 1000; i++) {
list.add(rand.nextInt());
}
}
}
@Benchmark
public void benchmark1_original(BenchmarkState state, Blackhole bh) {
List<Integer> list = state.list;
for (long i = 0; i < 1_000_000; i++) {
bh.consume(JvmSizeUtils.roundUpSize_original(i));
}
}
@Benchmark
public void benchmark2_improved(BenchmarkState state, Blackhole bh) {
List<Integer> list = state.list;
for (long i = 0; i < 1_000_000; i++) {
bh.consume(JvmSizeUtils.roundUpSize(i));
}
}
@Test
public void launchBenchmark() throws Exception {
Options opt = new OptionsBuilder()
// Specify which benchmarks to run.
// You can be more specific if you'd like to run only one benchmark
per test.
.include(this.getClass().getName() + ".*")
// Set the following options as needed
.mode(Mode.AverageTime)
.timeUnit(TimeUnit.MICROSECONDS)
.warmupTime(TimeValue.seconds(1))
.warmupIterations(2)
.measurementTime(TimeValue.seconds(4))
.measurementIterations(5)
.threads(2)
.forks(1)
.shouldFailOnError(true)
.shouldDoGC(true)
// .jvmArgs("-XX:+UnlockDiagnosticVMOptions", "-XX:+PrintInlining")
// .addProfiler(SafepointsProfiler.class)
// .addProfiler(GCProfiler.class)
// .addProfiler(HotspotRuntimeProfiler.class)
// .addProfiler(HotspotMemoryProfiler.class)
// .addProfiler(StackProfiler.class)
.build();
new Runner(opt).run();
}
}
```
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