372 lines
14 KiB
Java
372 lines
14 KiB
Java
/*
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* Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2024, Alibaba Group Holding Limited. 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.lang;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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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.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Param;
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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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import java.util.concurrent.TimeUnit;
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/**
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* Trivial String concatenation benchmark.
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*/
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@State(Scope.Thread)
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@Warmup(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
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@Measurement(iterations = 5, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
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@Fork(3)
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public class StringConcat {
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@Param("4711")
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public int intValue;
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public Integer integerValue = intValue;
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public float floatValue = 156456.36435637F + intValue;
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public String stringValue = String.valueOf(intValue);
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public Object objectValue = Long.valueOf(intValue);
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public boolean boolValue = true;
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public Boolean booleanValue = Boolean.TRUE;
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public byte byteValue = (byte)-128;
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public String emptyString = "";
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@Benchmark
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public String concatConstBool() {
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return "string" + boolValue;
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}
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@Benchmark
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public String concatConstBoolean() {
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return "string" + booleanValue;
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}
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@Benchmark
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public String concatConstInt() {
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return "string" + intValue;
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}
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@Benchmark
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public String concatConstInteger() {
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return "string" + integerValue;
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}
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@Benchmark
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public String concatConstFloat() {
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return "string" + floatValue;
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}
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@Benchmark
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public String concatConstString() {
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return "string" + stringValue;
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}
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@Benchmark
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public String concatEmptyRight() {
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return stringValue + emptyString;
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}
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@Benchmark
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public String concatEmptyLeft() {
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return emptyString + stringValue;
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}
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@Benchmark
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public String concatEmptyConstInt() {
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return "" + intValue;
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}
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@Benchmark
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public String concatEmptyConstString() {
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return "" + stringValue;
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}
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@Benchmark
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public String concatMethodConstString() {
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return "string".concat(stringValue);
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}
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@Benchmark
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public String concatConstBoolString() {
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return "string" + boolValue + stringValue;
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}
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@Benchmark
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public String concatConstBooleanString() {
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return "string" + booleanValue + stringValue;
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}
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@Benchmark
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public String concatConstIntString() {
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return "string" + intValue + stringValue;
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}
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@Benchmark
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public String concatConstIntegerString() {
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return "string" + integerValue + stringValue;
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}
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@Benchmark
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public String concatConstFloatString() {
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return "string" + floatValue + stringValue;
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}
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@Benchmark
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public String concatConstIntConstInt() {
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return "string" + intValue + "string" + intValue;
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}
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@Benchmark
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public String concatConstStringConstInt() {
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return "string" + stringValue + "string" + intValue;
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}
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@Benchmark
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public String concatConstStringConst() {
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return "string" + stringValue + "string";
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}
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@Benchmark
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public String concatConstIntConst() {
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return "string" + intValue + "string";
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}
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@Benchmark
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public String concatConstIntegerConst() {
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return "string" + integerValue + "string";
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}
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@Benchmark
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public String concatConstFloatConst() {
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return "string" + floatValue + "string";
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}
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@Benchmark
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public String concatConstObjectConst() {
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return "string" + objectValue + "string";
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}
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@Benchmark
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public String concatConstBooleanConst() {
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return "string" + booleanValue + "string";
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}
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@Benchmark
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public String concatMix4String() {
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// Investigate "profile pollution" between shared LFs that might eliminate some JIT optimizations
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String s1 = "string" + stringValue + stringValue + stringValue + stringValue;
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String s2 = "string" + stringValue + "string" + stringValue + stringValue + stringValue;
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String s3 = stringValue + stringValue + "string" + stringValue + "string" + stringValue + "string";
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String s4 = "string" + stringValue + "string" + stringValue + "string" + stringValue + "string" + stringValue + "string";
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return s1 + s2 + s3 + s4;
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}
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@Benchmark
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public String concat3String() {
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return stringValue + stringValue + stringValue;
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}
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@Benchmark
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public String concatStringBoolString() {
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return stringValue + boolValue + stringValue;
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}
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@Benchmark
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public String concatStringBooleanString() {
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return stringValue + booleanValue + stringValue;
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}
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@Benchmark
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public String concatStringIntString() {
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return stringValue + intValue + stringValue;
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}
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@Benchmark
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public String concatStringIntegerString() {
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return stringValue + integerValue + stringValue;
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}
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@Benchmark
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public String concatConst4String() {
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return "string" + stringValue + stringValue + stringValue + stringValue;
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}
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@Benchmark
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public String concat4String() {
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return stringValue + stringValue + stringValue + stringValue;
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}
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@Benchmark
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public String concatConst2String() {
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return "string" + stringValue + stringValue;
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}
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@Benchmark
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public String concatConstBoolByte() {
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return "string" + boolValue + byteValue;
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}
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@Benchmark
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public String concatConst6String() {
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return "string" + stringValue + stringValue + stringValue + stringValue + stringValue + stringValue;
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}
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@Benchmark
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public String concat6String() {
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return stringValue + stringValue + stringValue + stringValue + stringValue + stringValue;
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}
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@Benchmark
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public String concatConst6Object() {
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return "string" + objectValue + objectValue + objectValue + objectValue + objectValue + objectValue;
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}
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private String
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f0="1", f1="1", f2="1", f3="1", f4="1", f5="1", f6="1", f7="1", f8="1", f9="1",
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f10="1", f11="1", f12="1", f13="1", f14="1", f15="1", f16="1", f17="1", f18="1", f19="1",
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f20="1", f21="1", f22="1", f23="1", f24="1", f25="1", f26="1", f27="1", f28="1", f29="1",
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f30="1", f31="1", f32="1", f33="1", f34="1", f35="1", f36="1", f37="1", f38="1", f39="1",
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f40="1", f41="1", f42="1", f43="1", f44="1", f45="1", f46="1", f47="1", f48="1", f49="1",
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f50="1", f51="1", f52="1", f53="1", f54="1", f55="1", f56="1", f57="1", f58="1", f59="1",
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f60="1", f61="1", f62="1", f63="1", f64="1", f65="1", f66="1", f67="1", f68="1", f69="1",
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f70="1", f71="1", f72="1", f73="1", f74="1", f75="1", f76="1", f77="1", f78="1", f79="1",
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f80="1", f81="1", f82="1", f83="1", f84="1", f85="1", f86="1", f87="1", f88="1", f89="1",
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f90="1", f91="1", f92="1", f93="1", f94="1", f95="1", f96="1", f97="1", f98="1", f99="1",
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f100="1",f101="1",f102="1",f103="1",f104="1",f105="1",f106="1",f107="1",f108="1",f109="1",
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f110="1",f111="1",f112="1",f113="1",f114="1",f115="1",f116="1",f117="1",f118="1",f119="1",
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f120="1",f121="1",f122="1";
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@Benchmark
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public String concat13String() {
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return f0 + ","+ f1 + ","+ f2 + ","+ f3 + ","+ f4 + ","+ f5 + ","+ f6 + ","+ f7 + ","+ f8 + ","+ f9 + ","
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+ f10 + ","+ f11 + ","+ f12;
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}
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@Benchmark
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public String concat23String() {
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return f0 + ","+ f1 + ","+ f2 + ","+ f3 + ","+ f4 + ","+ f5 + ","+ f6 + ","+ f7 + ","+ f8 + ","+ f9 + ","
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+ f10 + ","+ f11 + ","+ f12 + ","+ f13 + ","+ f14 + ","+ f15 + ","+ f16 + ","+ f17 + ","+ f18 + ","+ f19 + ","
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+ f20 + ","+ f21 + ","+ f22;
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}
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@Benchmark
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public String concat30Mix() {
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return f0 + "," + f1 + ","+ f2 + ","+ f3 + ","+ f4 + ","+ f5 + ","+ f6 + ","+ f7 + ","+ f8 + ","+ f9 + ","
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+f10 + ","+f11 + ","+f12 + ","+ f13 + ","+ f14 + ","+ f15 + ","+ f16 + ","+ f17 + ","+ f18 + ","+ f19 + ","
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+f20 + ","+f21 + ","+f22 + "," + boolValue + "," + booleanValue + "," + intValue + "," + integerValue
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+ "," + floatValue + "," + byteValue + "," + objectValue;
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}
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@Benchmark
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public String concat123String() {
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return f0 + ","+ f1 + ","+ f2 + ","+ f3 + ","+ f4 + ","+ f5 + ","+ f6 + ","+ f7 + ","+ f8 + ","+ f9 + ","
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+ f10 + ","+ f11 + ","+ f12 + ","+ f13 + ","+ f14 + ","+ f15 + ","+ f16 + ","+ f17 + ","+ f18 + ","+ f19 + ","
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+ f20 + ","+ f21 + ","+ f22 + ","+ f23 + ","+ f24 + ","+ f25 + ","+ f26 + ","+ f27 + ","+ f28 + ","+ f29 + ","
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+ f30 + ","+ f31 + ","+ f32 + ","+ f33 + ","+ f34 + ","+ f35 + ","+ f36 + ","+ f37 + ","+ f38 + ","+ f39 + ","
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+ f40 + ","+ f41 + ","+ f42 + ","+ f43 + ","+ f44 + ","+ f45 + ","+ f46 + ","+ f47 + ","+ f48 + ","+ f49 + ","
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+ f50 + ","+ f51 + ","+ f52 + ","+ f53 + ","+ f54 + ","+ f55 + ","+ f56 + ","+ f57 + ","+ f58 + ","+ f59 + ","
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+ f60 + ","+ f61 + ","+ f62 + ","+ f63 + ","+ f64 + ","+ f65 + ","+ f66 + ","+ f67 + ","+ f68 + ","+ f69 + ","
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+ f70 + ","+ f71 + ","+ f72 + ","+ f73 + ","+ f74 + ","+ f75 + ","+ f76 + ","+ f77 + ","+ f78 + ","+ f79 + ","
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+ f80 + ","+ f81 + ","+ f82 + ","+ f83 + ","+ f84 + ","+ f85 + ","+ f86 + ","+ f87 + ","+ f88 + ","+ f89 + ","
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+ f90 + ","+ f91 + ","+ f92 + ","+ f93 + ","+ f94 + ","+ f95 + ","+ f96 + ","+ f97 + ","+ f98 + ","+ f99 + ","
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+f100 + ","+f101 + ","+f102 + ","+f103 + ","+f104 + ","+f105 + ","+f106 + ","+f107 + ","+f108 + ","+f109 + ","
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+f110 + ","+f111 + ","+f112 + ","+f113 + ","+f114 + ","+f115 + ","+f116 + ","+f117 + ","+f118 + ","+f119 + ","
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+f120 + ","+f121 + ","+f122;
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}
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@Benchmark
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public String concat13StringConst() {
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return f0 + f1 + f2 + f3 + f4
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+ f5 + f6 + f7 + f8 + f9
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+f10 + f11 + f12 + """
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A really long constant string. Such as a copyright header:
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* Copyright (c) 2018, 2024, 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,
|
|
* 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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}
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@Benchmark
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public String concat23StringConst() {
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return f0 + f1 + f2 + f3 + f4 + f5 + f6 + f7 + f8 + f9 + f10 + f11 + f12 + f13 + f14 + f15 + f16 + f17 + f18 + f19 + f20 + f21 + f22 + """
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A really long constant string. Such as a copyright header:
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* Copyright (c) 2018, 2024, 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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* 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
|
|
* 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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* 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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}
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public static void main(String... args) {
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StringConcat concat = new StringConcat();
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concat.concat4String();
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concat.concat123String();
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concat.concat6String();
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concat.concat13String();
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concat.concat23String();
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concat.concatConstInt();
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}
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}
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