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73 lines
2.3 KiB
Java
73 lines
2.3 KiB
Java
/*
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* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.openjdk.bench.java.nio;
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import java.nio.CharBuffer;
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import java.util.concurrent.TimeUnit;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.Fork;
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import org.openjdk.jmh.annotations.Measurement;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.annotations.Warmup;
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/**
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* Benchmark for bulk get methods of a {@code CharBuffer} created from a
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* {@code CharSequence}.
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*/
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@Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
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@Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
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@State(Scope.Benchmark)
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@Fork(1)
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public class StringCharBufferBulkTransfer {
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private static final int LENGTH = 16384;
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char[] buf = new char[LENGTH];
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CharBuffer cb = CharBuffer.wrap(new String(buf));
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char[] dst = new char[LENGTH];
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CharBuffer cbw = CharBuffer.allocate(LENGTH);
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@Benchmark
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public void absoluteBulkGet() {
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cb.get(0, dst, 0, dst.length);
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}
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@Benchmark
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public void relativeBulkGet() {
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cb.get(dst, 0, dst.length);
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cb.position(0);
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}
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@Benchmark
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public void getChars() {
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cb.getChars(0, LENGTH, dst, 0);
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}
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@Benchmark
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public void absoluteBulkPut() {
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cbw.put(0, cb, 0, dst.length);
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}
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}
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