archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-27 23:04:50 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8271840: Add simple Integer.toString microbenchmarks

Browse source 
Reviewed-by: shade
This commit is contained in:
Claes Redestad 2021-08-05 14:46:38 +00:00
parent 18dd4d469d
commit 55bd52a142
2 changed files with 40 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

34
test/micro/org/openjdk/bench/java/lang/Integers.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2014, 2021, 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
@ -24,36 +24,48 @@ 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.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;
import org.openjdk.jmh.infra.Blackhole;
import java.util.Random;
import java.util.concurrent.TimeUnit;
/**
* Tests java.lang.Integer
* Test various java.lang.Integer operations
*/
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@State(Scope.Thread)
@Warmup(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 5, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
@Fork(3)
public class Integers {
@Param("500")
private int size;
private String[] strings;
private int[] intsSmall;
private int[] intsBig;
@Setup
public void setup() {
Random r = new Random(0);
strings = new String[size];
intsSmall = new int[size];
intsBig = new int[size];
for (int i = 0; i < size; i++) {
strings[i] = "" + (r.nextInt(10000) - 5000);
strings[i] = "" + (r.nextInt(10000) - (5000));
intsSmall[i] = 100 * i + i + 103;
intsBig[i] = ((100 * i + i) << 24) + 4543 + i * 4;
}
}
@ -63,4 +75,20 @@ public class Integers {
bh.consume(Integer.parseInt(s));
}
}
/** Performs toString on small values, just a couple of digits. */
@Benchmark
public void toStringSmall(Blackhole bh) {
for (int i : intsSmall) {
bh.consume(Integer.toString(i));
}
}
/** Performs toString on large values, roughly 10 digits. */
@Benchmark
public void toStringBig(Blackhole bh) {
for (int i : intsBig) {
bh.consume(Integer.toString(i));
}
}
}