org.apache.commons.geometry.examples.jmh

Class BenchmarkUtils

java.lang.Object

org.apache.commons.geometry.examples.jmh.BenchmarkUtils

public final class BenchmarkUtils
extends Object

Class containing static utility methods for performance benchmarks.

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_MAX_EXP Default max exponent for random double values.
static int	DEFAULT_MIN_EXP Default min exponent for random double values.

Method Summary

Modifier and Type	Method and Description
static double	randomDouble(int minExp, int maxExp, org.apache.commons.rng.UniformRandomProvider rng) Create a random double value with exponent in the range [minExp, maxExp].
static double	randomDouble(org.apache.commons.rng.UniformRandomProvider rng) Creates a random double number with a random sign and mantissa and a large, default range for the exponent.
static double[]	randomDoubleArray(int len, int minExp, int maxExp, org.apache.commons.rng.UniformRandomProvider rng) Create an array with the given length containing random doubles with exponents in the range [minExp, maxExp].
static double[]	randomDoubleArray(int len, org.apache.commons.rng.UniformRandomProvider rng) Create an array of doubles populated using randomDouble(UniformRandomProvider).

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_MIN_EXP

public static final int DEFAULT_MIN_EXP

Default min exponent for random double values.

See Also:

Constant Field Values

DEFAULT_MAX_EXP

public static final int DEFAULT_MAX_EXP

Default max exponent for random double values.

See Also:

Constant Field Values

Method Detail

randomDouble

public static double randomDouble(org.apache.commons.rng.UniformRandomProvider rng)

Creates a random double number with a random sign and mantissa and a large, default range for the exponent. The numbers will not be uniform over the range.

Parameters:

rng - random number generator

Returns:

the random number

randomDouble

public static double randomDouble(int minExp,
                                  int maxExp,
                                  org.apache.commons.rng.UniformRandomProvider rng)

Create a random double value with exponent in the range [minExp, maxExp].

Parameters:

minExp - minimum exponent; must be less than maxExp

maxExp - maximum exponent; must be greater than minExp

rng - random number generator

Returns:

random double

randomDoubleArray

public static double[] randomDoubleArray(int len,
                                         org.apache.commons.rng.UniformRandomProvider rng)

Create an array of doubles populated using randomDouble(UniformRandomProvider).

Parameters:

rng - uniform random provider

len - array length

Returns:

array containing len random doubles

randomDoubleArray

public static double[] randomDoubleArray(int len,
                                         int minExp,
                                         int maxExp,
                                         org.apache.commons.rng.UniformRandomProvider rng)

Create an array with the given length containing random doubles with exponents in the range [minExp, maxExp].

Parameters:

len - array length

minExp - minimum exponent; must be less than maxExp

maxExp - maximum exponent; must be greater than minExp

rng - random number generator

Returns:

array of random doubles