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8285001: Simplify StringLatin1.regionMatches

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Reviewed-by: rriggs, naoto
This commit is contained in:
Claes Redestad 2022-04-19 20:29:16 +00:00
parent 5d1ec54d6c
commit e307bc8694
3 changed files with 92 additions and 7 deletions
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17
test/micro/org/openjdk/bench/java/lang/StringOther.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* 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
@ -24,30 +24,39 @@ package org.openjdk.bench.java.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.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.infra.Blackhole;
import java.util.Locale;
import java.util.Random;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
@Warmup(iterations = 10, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 5, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
@Fork(3)
public class StringOther {
private String testString;
private Random rnd;
private String str1, str2, str3, str4;
private String str1UP;
@Setup
public void setup() {
testString = "Idealism is what precedes experience; cynicism is what follows.";
str1 = "vm-guld vm-guld vm-guld";
str1UP = str1.toUpperCase(Locale.ROOT);
str2 = "vm-guld vm-guld vm-guldx";
str3 = "vm-guld vm-guld vm-guldx";
str4 = "adadaskasdjierudks";
@ -85,4 +94,10 @@ public class StringOther {
return String.valueOf(rnd.nextInt()).intern();
}
@Benchmark
public void regionMatchesLatin1(Blackhole bh) {
bh.consume(str1.regionMatches(true, 0, str2, 0, str1.length()));
bh.consume(str2.regionMatches(true, 16, str1UP, 0, 8));
bh.consume(str3.regionMatches(true, 6, str4, 1, 2));
}
}