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18 package org.apache.commons.rng.examples.jmh.distribution;
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20 import org.openjdk.jmh.annotations.Benchmark;
21 import org.openjdk.jmh.annotations.BenchmarkMode;
22 import org.openjdk.jmh.annotations.Mode;
23 import org.openjdk.jmh.annotations.Warmup;
24 import org.openjdk.jmh.annotations.Measurement;
25 import org.openjdk.jmh.annotations.State;
26 import org.openjdk.jmh.annotations.Fork;
27 import org.openjdk.jmh.annotations.Scope;
28 import org.openjdk.jmh.annotations.OutputTimeUnit;
29 import org.openjdk.jmh.infra.Blackhole;
30 import java.util.concurrent.TimeUnit;
31 import java.util.Random;
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37 @BenchmarkMode(Mode.AverageTime)
38 @OutputTimeUnit(TimeUnit.MICROSECONDS)
39 @Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
40 @Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
41 @State(Scope.Benchmark)
42 @Fork(value = 1, jvmArgs = {"-server", "-Xms128M", "-Xmx128M"})
43 public class NextGaussianPerformance {
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45 private static final int NUM_SAMPLES = 10000000;
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47 private final Random random = new Random();
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53 private void runSample(Blackhole bh) {
54 for (int i = 0; i < NUM_SAMPLES; i++) {
55 bh.consume(random.nextGaussian());
56 }
57 }
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64 @Benchmark
65 public void runJDKRandomGaussianSampler(Blackhole bh) {
66 runSample(bh);
67 }
68 }