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8302877: Speed up latin1 case conversions

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Reviewed-by: naoto, redestad
This commit is contained in:
Eirik Bjorsnos 2023-02-21 20:54:36 +00:00 • committed by Naoto Sato
parent 1ea5f9f7cd
commit ef1f7bd3b8
5 changed files with 166 additions and 23 deletions
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47
test/micro/org/openjdk/bench/java/lang/Characters.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2018, 2023, 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
@ -27,11 +27,13 @@ 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.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
@ -80,4 +82,47 @@ public class Characters {
}
}
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
@Warmup(iterations = 5, time = 1)
@Measurement(iterations = 5, time = 1)
@Fork(3)
public static class CaseConversions {
@Param({
"low", // 0x09 pre A
"A", // 0x41 uppercase A
"a", // 0x61 lowercase a
"A-grave", // 0xC0 uppercase A-grave
"a-grave", // 0xE0 lowercase a-grave
"micro", // 0xB5 lowercase 'Micro Sign'
"yD" // 0xFF lowercase 'y with Diaeresis'
})
private String codePoint;
private int cp;
@Setup(Level.Trial)
public void setup() {
cp = switch (codePoint) {
case "low" -> 0x09;
case "A" -> 0x41;
case "a" -> 0x61;
case "A-grave" -> 0xC0;
case "a-grave" -> 0xE0;
case "yD" -> 0xE0;
case "micro" -> 0xFF;
default -> Integer.parseInt(codePoint);;
};
}
@Benchmark
public int toUpperCase() {
return Character.toUpperCase(cp);
}
@Benchmark
public int toLowerCase() {
return Character.toLowerCase(cp);
}
}
}