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JMH benchmarks for Kryo.
There is a newer version: 5.6.0
/* Copyright (c) 2008-2023, Nathan Sweet
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
 * conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided with the distribution.
 * - Neither the name of Esoteric Software nor the names of its contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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package com.esotericsoftware.kryo.benchmarks.io;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;

@BenchmarkMode(Mode.SingleShotTime)
@Measurement(batchSize = 12000000)
public class StringBenchmark {
	@Benchmark
	public void writeString (InputOutputState state) {
		state.reset();
		state.output.writeString("abc0123456789"); // Short enough to be detected as ASCII.
	}

	@Benchmark
	public String readString (ReadString state) {
		state.reset();
		return state.input.readString();
	}

	@Benchmark
	public void writeStringLong (InputOutputState state) {
		state.reset();
		state.output.writeString(
			"abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz0123456789");
	}

	@Benchmark
	public String readStringLong (ReadStringLong state) {
		state.reset();
		return state.input.readString();
	}

	@Benchmark
	public void writeAsciiLong (InputOutputState state) {
		state.reset();
		state.output.writeAscii(
			"abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz0123456789");
	}

	@Benchmark
	public String readAsciiLong (ReadAsciiLong state) {
		state.reset();
		return state.input.readString();
	}

	//

	@State(Scope.Thread)
	static public class ReadString extends InputOutputState {
		public void setup () {
			super.setup();
			new StringBenchmark().writeString(this);
		}
	}

	@State(Scope.Thread)
	static public class ReadStringLong extends InputOutputState {
		public void setup () {
			super.setup();
			new StringBenchmark().writeStringLong(this);
		}
	}

	@State(Scope.Thread)
	static public class ReadAsciiLong extends InputOutputState {
		public void setup () {
			super.setup();
			new StringBenchmark().writeAsciiLong(this);
		}
	}
}