examples
Class CopyArrayBenchmark

java.lang.Object
  com.google.caliper.api.Benchmark
      com.google.caliper.SimpleBenchmark
          examples.CopyArrayBenchmark

All Implemented Interfaces:

com.google.caliper.Benchmark

public class CopyArrayBenchmark
extends com.google.caliper.SimpleBenchmark

Tests each of the three (non-manual) ways to copy an array, for all nine array types.

For a recent (2010) build of OpenJDK on linux, this benchmark confirms these facts:

• The three methods of copying have indistinguishable performance for all nine types.
• As array sizes get large, the runtime is indeed proportional to the size of the array in memory (boolean arrays count as byte arrays!).

Nested Class Summary

static class

CopyArrayBenchmark.Strategy

Constructor Summary

CopyArrayBenchmark()

Method Summary

static void	main(String[] args)
protected void	setUp()
int	timeBooleans(int reps)
int	timeBytes(int reps)
int	timeChars(int reps)
int	timeDoubles(int reps)
int	timeFloats(int reps)
int	timeInts(int reps)
int	timeLongs(int reps)
int	timeObjects(int reps)
int	timeShorts(int reps)

Methods inherited from class com.google.caliper.SimpleBenchmark

bytesToUnits, createBenchmark, getInstanceUnitNames, getMemoryUnitNames, getTimeUnitNames, instancesToUnits, nanosToUnits, normalizeScenario, parameterNames, parameterValues, tearDown

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CopyArrayBenchmark

public CopyArrayBenchmark()

Method Detail

setUp

protected void setUp()

Overrides:

setUp in class com.google.caliper.SimpleBenchmark

timeObjects

public int timeObjects(int reps)

timeBooleans

public int timeBooleans(int reps)

timeBytes

public int timeBytes(int reps)

timeChars

public int timeChars(int reps)

timeDoubles

public int timeDoubles(int reps)

timeFloats

public int timeFloats(int reps)

timeInts

public int timeInts(int reps)

timeLongs

public int timeLongs(int reps)

timeShorts

public int timeShorts(int reps)

main

public static void main(String[] args)