Http2PseudoHeadersLookupBenchmark.java — netty Source File

Source Code

/*
 * Copyright 2024 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
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package io.netty.handler.codec.http2;

import io.netty.handler.codec.http2.Http2Headers.PseudoHeaderName;
import io.netty.microbench.util.AbstractMicrobenchmark;
import io.netty.util.AsciiString;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.CompilerControl;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
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 org.openjdk.jmh.infra.Blackhole;

import java.util.concurrent.TimeUnit;


@State(Scope.Benchmark)
@Warmup(iterations = 10, time = 200, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 10, time = 200, timeUnit = TimeUnit.MILLISECONDS)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public class Http2PseudoHeadersLookupBenchmark extends AbstractMicrobenchmark {

    @Param({ "true", "false" })
    public boolean same;

    private AsciiString[] asciiStrings;
    private String[] strings;

    private DefaultHttp2Headers headers;
    @Setup
    public void init() {
        // this benchmark is assuming a good happy path:
        // 1. ascii strings have hashCode cached
        // 2. String doesn't have AsciiString::hashCode cached -> cannot be compared directly with AsciiStrings!
        // 3. the call-sites are never observing the 2 types together
        PseudoHeaderName[] pseudoHeaderNames = PseudoHeaderName.values();
        asciiStrings = new AsciiString[pseudoHeaderNames.length];
        strings = new String[pseudoHeaderNames.length];
        for (int i = 0; i < pseudoHeaderNames.length; i++) {
// ... (62 more lines)