/*
* Copyright 2015 Ben Manes. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.benmanes.caffeine.cache;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import com.yahoo.ycsb.generator.NumberGenerator;
import com.yahoo.ycsb.generator.ScrambledZipfianGenerator;
/**
* <pre>{@code
* ./gradlew jmh -PincludePattern=FrequencySketchBenchmark
* }</pre>
*
* @author ben.manes@gmail.com (Ben Manes)
*/
@State(Scope.Benchmark)
public class FrequencySketchBenchmark {
private static final int SIZE = (2 << 14);
private static final int MASK = SIZE - 1;
private static final int ITEMS = SIZE / 3;
int index = 0;
Integer[] ints;
FrequencySketch<Integer> sketch;
@Setup
public void setup() {
ints = new Integer[SIZE];
sketch = new FrequencySketch<>();
sketch.ensureCapacity(ITEMS);
NumberGenerator generator = new ScrambledZipfianGenerator(ITEMS);
for (int i = 0; i < SIZE; i++) {
ints[i] = generator.nextValue().intValue();
sketch.increment(i);
}
}
@Benchmark
public void increment() {
sketch.increment(ints[index++ & MASK]);
}
@Benchmark
public int frequency() {
return sketch.frequency(ints[index++ & MASK]);
}
}