test/micro/org/openjdk/bench/java/lang/StringEncode.java - master - githubmirror/jdk11u-dev

test/micro/org/openjdk/bench/java/lang/StringEncode.java
124 строки6 KB
Goetz Lindenmaier
8279833: Loop optimization issue in String.encodeUTF8_UTF16
26 янв 2022, 11:18
26 янв 2022, 11:1884ed967
/*
 * Copyright (c) 2021, 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.lang;

import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Blackhole;

import java.nio.charset.Charset;
import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Fork(value = 3)
@Warmup(iterations = 5, time = 2)
@Measurement(iterations = 5, time = 3)
@State(Scope.Thread)
public class StringEncode {

    @Param({"US-ASCII", "ISO-8859-1", "UTF-8", "MS932", "ISO-8859-6"})
    private String charsetName;
    private Charset charset;
    private String asciiString;
    private String utf16String;
    private String longUtf16String;
    private String longUtf16StartString;

    @Setup
    public void setup() {
        charset = Charset.forName(charsetName);
        asciiString = "ascii string";
        utf16String = "UTF-\uFF11\uFF16 string";
        longUtf16String =
                 " Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam ac sem eu\n" +
                 " urna egestas placerat. Etiam finibus ipsum nulla, non mattis dolor cursus a.\n" +
                 " Nulla nec nisl consectetur, lacinia neque id, accumsan ante. Curabitur et\n" +
                 " sapien in magna porta ultricies. Sed vel pellentesque nibh. Pellentesque dictum\n" +
                 " dignissim diam eu ultricies. Class aptent taciti sociosqu ad litora torquent\n" +
                 " per conubia nostra, per inceptos himenaeos. Suspendisse erat diam, fringilla\n" +
                 " sed massa sed, posuere viverra orci. Suspendisse tempor libero non gravida\n" +
                 " efficitur. Vivamus lacinia risus non orci viverra, at consectetur odio laoreet.\n" +
                 " Suspendisse potenti.\n" +
                 "\n" +
                 " Phasellus vel nisi iaculis, accumsan quam sed, bibendum eros. Sed venenatis\n" +
                 " nulla tortor, et eleifend urna sodales id. Nullam tempus ac metus sit amet\n" +
                 " sollicitudin. Nam sed ex diam. Praesent vitae eros et neque condimentum\n" +
                 " consectetur eget non tortor. Praesent bibendum vel felis nec dignissim.\n" +
                 " Maecenas a enim diam. Suspendisse quis ligula at nisi accumsan lacinia id\n" +
                 " hendrerit sapien. Donec aliquam mattis lectus eu ultrices. Duis eu nisl\n" +
                 " euismod, blandit mauris vel, placerat urna. Etiam malesuada enim purus,\n" +
                 " tristique mollis odio blandit quis. Vivamus posuere.\n" +
                 " \uFF11";
        longUtf16StartString =
                 " \uFF11" +
                 " Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam ac sem eu\n" +
                 " urna egestas placerat. Etiam finibus ipsum nulla, non mattis dolor cursus a.\n" +
                 " Nulla nec nisl consectetur, lacinia neque id, accumsan ante. Curabitur et\n" +
                 " sapien in magna porta ultricies. Sed vel pellentesque nibh. Pellentesque dictum\n" +
                 " dignissim diam eu ultricies. Class aptent taciti sociosqu ad litora torquent\n" +
                 " per conubia nostra, per inceptos himenaeos. Suspendisse erat diam, fringilla\n" +
                 " sed massa sed, posuere viverra orci. Suspendisse tempor libero non gravida\n" +
                 " efficitur. Vivamus lacinia risus non orci viverra, at consectetur odio laoreet.\n" +
                 " Suspendisse potenti.\n" +
                 "\n" +
                 " Phasellus vel nisi iaculis, accumsan quam sed, bibendum eros. Sed venenatis\n" +
                 " nulla tortor, et eleifend urna sodales id. Nullam tempus ac metus sit amet\n" +
                 " sollicitudin. Nam sed ex diam. Praesent vitae eros et neque condimentum\n" +
                 " consectetur eget non tortor. Praesent bibendum vel felis nec dignissim.\n" +
                 " Maecenas a enim diam. Suspendisse quis ligula at nisi accumsan lacinia id\n" +
                 " hendrerit sapien. Donec aliquam mattis lectus eu ultrices. Duis eu nisl\n" +
                 " euismod, blandit mauris vel, placerat urna. Etiam malesuada enim purus,\n" +
                 " tristique mollis odio blandit quis. Vivamus posuere.\n";
    }

    @Benchmark
    public byte[] encodeAsciiCharsetName() throws Exception {
        return asciiString.getBytes(charset);
    }

    @Benchmark
    public byte[] encodeAscii() throws Exception {
        return asciiString.getBytes(charset);
    }

    @Benchmark
    public void encodeMix(Blackhole bh) throws Exception {
        bh.consume(asciiString.getBytes(charset));
        bh.consume(utf16String.getBytes(charset));
    }

    @Benchmark
    public byte[] encodeUTF16LongEnd() throws Exception {
        return longUtf16String.getBytes(charset);
    }

    @Benchmark
    public byte[] encodeUTF16LongStart() throws Exception {
        return longUtf16StartString.getBytes(charset);
    }

    @Benchmark
    public byte[] encodeUTF16() throws Exception {
        return utf16String.getBytes(charset);
    }
}