Module com.fasterxml.uuid

Package perf

Class MeasurePerformance

java.lang.Object

perf.MeasurePerformance

public class MeasurePerformance
extends Object

Simple micro-benchmark for evaluating performance of various UUID generation techniques, including JDK's method as well as JUG's versions.

Notes: for name-based version we will pass plain Strings, assuming this is the most common use case; even though it is possible to also pass raw byte arrays. JDK and Jug implementations have similar performance so this only changes relative speeds of name- vs time-based versions.

Since:

3.1

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	COUNT
private static final int	DEFAULT_ROUNDS
private static final byte[]	NAME_BYTES
private static final String	NAME_STRING
private final int	rounds
private final boolean	runForever

Constructor Summary

Constructors

Constructor	Description
MeasurePerformance()
MeasurePerformance(int rounds, boolean runForever)

Method Summary

Modifier and Type	Method	Description
static void	main(String[] args)
void	test()
private final void	testJDK(Object[] uuids, int rounds)
private final void	testJDKNames(Object[] uuids, int rounds)
private final void	testNameBased(Object[] uuids, int rounds, StringArgGenerator uuidGen)
private final void	testRandom(Object[] uuids, int rounds, RandomBasedGenerator uuidGen)
private final void	testTimeBased(Object[] uuids, int rounds, TimeBasedGenerator uuidGen)

Methods inherited from class java.lang.Object

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

Field Details

NAME_STRING

private static final String NAME_STRING

See Also:

• Constant Field Values

NAME_BYTES

private static final byte[] NAME_BYTES

COUNT

private static final int COUNT

See Also:

• Constant Field Values

DEFAULT_ROUNDS

private static final int DEFAULT_ROUNDS

See Also:

• Constant Field Values

rounds

private final int rounds

runForever

private final boolean runForever

Constructor Details

MeasurePerformance

public MeasurePerformance()

MeasurePerformance

public MeasurePerformance(int rounds,
 boolean runForever)

Method Details

test

public void test()
          throws Exception

Throws:

Exception

testJDK

private final void testJDK(Object[] uuids,
 int rounds)

testJDKNames

private final void testJDKNames(Object[] uuids,
 int rounds)
                         throws IOException

Throws:

IOException

testRandom

private final void testRandom(Object[] uuids,
 int rounds,
 RandomBasedGenerator uuidGen)

testTimeBased

private final void testTimeBased(Object[] uuids,
 int rounds,
 TimeBasedGenerator uuidGen)

testNameBased

private final void testNameBased(Object[] uuids,
 int rounds,
 StringArgGenerator uuidGen)

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception