/*
* Copyright ( c ) 2014 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
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*/
package org.openjdk.bench.java.io;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
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.io.DataOutputStream;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
/**
* Benchmark measuring UTF8 char operations .
*/
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Fork(2 )
@Warmup(iterations = 4 , time = 2 , timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 4 , time = 2 , timeUnit = TimeUnit.SECONDS)
@State(Scope.Thread )
public class UTF8 {
private String s;
private BlackholedOutputStream bos;
private DataOutputStream dos;
@Setup
public void setup(Blackhole bh) {
bos = new BlackholedOutputStream(bh);
dos = new DataOutputStream(bos);
s = "abcdefghijklmnopqrstuvxyz0123456789" ;
}
@Benchmark
public void testCharConversion() throws IOException {
dos.writeUTF(s);
}
}
Messung V0.5 in Prozent C=98 H=86 G=91
¤ Dauer der Verarbeitung: 0.14 Sekunden
(vorverarbeitet am 2026-06-19)
¤
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