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* Copyright ( c ) 2014 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
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* 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 .
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package org.openjdk.bench.vm.lang;
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.State;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.infra.Blackhole;
import java.util.concurrent.TimeUnit;
/**
* Tests throwing exceptions .
*/
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread )
@Warmup(iterations = 4 , time = 2 )
@Measurement(iterations = 4 , time = 2 )
@Fork(value = 3 )
public class Throw {
public static boolean alwaysTrue = true ;
private static Object nullObject = null ;
public Object useObject = new Object();
@Benchmark
public void throwSyncException(Blackhole bh) {
try {
throwingMethod();
} catch (Exception ex) {
bh.consume(useObject);
}
}
@Benchmark
public void throwASyncException(Blackhole bh) {
try {
throwNullpointer();
} catch (Exception ex) {
bh.consume(useObject);
}
}
@Benchmark
public void throwSyncExceptionUseException(Blackhole bh) {
try {
throwingMethod();
} catch (Exception ex) {
bh.consume(ex);
}
}
@Benchmark
public void throwSyncExceptionUseMessage(Blackhole bh) {
try {
throwingMethod();
} catch (Exception ex) {
bh.consume(ex.getMessage());
}
}
@Benchmark
public void throwSyncExceptionUseStacktrace(Blackhole bh) {
try {
throwingMethod();
} catch (Exception ex) {
bh.consume(ex.getStackTrace());
}
}
@Benchmark
public void throwWith16Frames(Blackhole bh) {
try {
throwingMethod(16 );
} catch (Exception ex) {
bh.consume(useObject);
}
}
@Benchmark
public void throwWith32Frames(Blackhole bh) {
try {
throwingMethod(32 );
} catch (Exception ex) {
bh.consume(useObject);
}
}
@Benchmark
public void throwWith64Frames(Blackhole bh) {
try {
throwingMethod(64 );
} catch (Exception ex) {
bh.consume(useObject);
}
}
public void throwingMethod() throws Exception {
if (alwaysTrue) {
throw new Exception();
}
}
public void throwingMethod(int i) throws Exception {
if (i == 0 ) {
throw new Exception();
}
throwingMethod(i - 1 );
}
public void throwNullpointer() {
nullObject.hashCode();
}
}
Messung V0.5 in Prozent C=89 H=84 G=86
¤ Dauer der Verarbeitung: 0.3 Sekunden
¤
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