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18 package org.apache.commons.rng.examples.jmh.sampling.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 java.util.concurrent.TimeUnit;
30 import java.util.Random;
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36 @BenchmarkMode(Mode.AverageTime)
37 @OutputTimeUnit(TimeUnit.NANOSECONDS)
38 @Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
39 @Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
40 @State(Scope.Benchmark)
41 @Fork(value = 1, jvmArgs = {"-server", "-Xms128M", "-Xmx128M"})
42 public class NextGaussianPerformance {
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44 private final Random random = new Random();
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51 private double value;
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58 @Benchmark
59 public double baseline() {
60 return value;
61 }
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68 @Benchmark
69 public double runJDKRandomGaussianSampler() {
70 return random.nextGaussian();
71 }
72 }