DecodeHexBenchmark.java — netty Source File

Source Code

/*
 * Copyright 2019 The Netty Project
 *
 * The Netty Project licenses this file to you 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:
 *
 *   https://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 io.netty.handler.codec.http;

import io.netty.microbench.util.AbstractMicrobenchmark;
import io.netty.util.internal.MathUtil;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.StringUtil;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.CompilerControl;
import org.openjdk.jmh.annotations.CompilerControl.Mode;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;

import java.util.Arrays;
import java.util.Random;
import java.util.concurrent.TimeUnit;

@State(Scope.Benchmark)
@Warmup(iterations = 5, time = 1)
@Measurement(iterations = 5, time = 1)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
public class DecodeHexBenchmark extends AbstractMicrobenchmark {

    @Param({
            //with HEX chars
            "135aBa9BBCEA030b947d79fCcaf48Bde",
            //with HEX chars + 'g'
            "4DDeA5gDD1C6fE567E1b6gf0C40FEcDg",
    })
    private String hex;
    // Needs to specify a high number of inputs to allow the current strategy
    // on nextHexDigits to produce enough branch-misses
    @Param({ "2048" })
    private int inputs;
    private char[][] hexDigits;
    private static final long SEED = 1578675524L;
    private long next;

    @Setup
    public void init() {
        final char[] hexCh = hex.toCharArray();
// ... (118 more lines)