/*
* Copyright ( c ) 2014 , 2022 , 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
* or visit www . oracle . com if you need additional information or have any
* questions .
*/
package org.openjdk.bench.java.util;
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.TearDown;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.infra.Blackhole;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.concurrent.TimeUnit;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
/**
* Tests ZipFile . getEntry ( ) on the microbenchmarks . jar zip file
*/
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread )
@Warmup(iterations = 4 , time = 2 )
@Measurement(iterations = 4 , time = 2 )
@Fork(value = 3 )
public class ZipFind {
// Files that exist in the microbenchmarks.jar zip file
public static final String[] existingFiles = {"org/openjdk/bench/java/util/ZipFind.class" ,
"org/openjdk/bench/vm/lang/Throw.class" ,
"org/openjdk/bench/java/nio/ByteBuffers.class" };
public static String[] nonExistingFiles = {"/try/to/findme.not" , "needle/in/a/HayStack.class" };
private ZipFile zip;
@Setup
public void prepare() throws IOException, URISyntaxException {
String zipFile = this .getClass().getProtectionDomain().getCodeSource().getLocation().toURI().getPath();
zip = new ZipFile(zipFile);
// Verify no typos in the filename lists above
assert zip.getEntry(ZipFind.nonExistingFiles[0 ]) == null ;
assert zip.getEntry(ZipFind.existingFiles[0 ]) != null ;
assert zip.getEntry(ZipFind.existingFiles[1 ]) != null ;
assert zip.getEntry(ZipFind.existingFiles[2 ]) != null ;
}
@TearDown
public void cleanup() throws IOException {
zip.close();
}
@Benchmark
public ZipEntry testOneNonExisting() throws IOException {
return zip.getEntry(ZipFind.nonExistingFiles[0 ]);
}
@Benchmark
public void testTwoNonExisting(Blackhole bh) throws IOException {
bh.consume(zip.getEntry(nonExistingFiles[0 ]));
bh.consume(zip.getEntry(nonExistingFiles[1 ]));
}
@Benchmark
public void testNonExistingAndExisting(Blackhole bh) throws IOException {
bh.consume(zip.getEntry(nonExistingFiles[0 ]));
bh.consume(zip.getEntry(existingFiles[0 ]));
}
@Benchmark
public ZipEntry testOneExisting() throws IOException {
return zip.getEntry(ZipFind.existingFiles[0 ]);
}
@Benchmark
public void testTwoExisting(Blackhole bh) throws IOException {
bh.consume(zip.getEntry(existingFiles[0 ]));
bh.consume(zip.getEntry(existingFiles[1 ]));
}
@Benchmark
public void testThreeExisting(Blackhole bh) throws IOException {
bh.consume(zip.getEntry(existingFiles[0 ]));
bh.consume(zip.getEntry(existingFiles[1 ]));
bh.consume(zip.getEntry(existingFiles[2 ]));
}
}
Messung V0.5 in Prozent C=97 H=71 G=84
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-06-27)
¤
*© Formatika GbR, Deutschland