com.singularsys.jepexamples.diagnostics
Class SpeedTest

java.lang.Object
  com.singularsys.jepexamples.diagnostics.SpeedTest

public class SpeedTest
extends java.lang.Object

Compares the speed of evaluation between different evaluation schemes. The standard class compares BigDecimal, Jep (with default Fast evaluator), the old StandardEvaluator, and RealEvaluator.

If you have some nice complicated examples, I'd love to hear about them to see if we can tune things up. - rich

Nested Class Summary

static class	SpeedTest.BDConfig Configuration using the BDConfig
static class	SpeedTest.EvaluationConfig Basic class to set the evaluation context
static class	SpeedTest.JepConfig Standard Jep configuration (with FastEvaluator)
static class	SpeedTest.OldConfig Configuration using the StandardEvaluator
static class	SpeedTest.Outputter Different output methods
static class	SpeedTest.RatioOutputter Print detailed ratios for each run.
static class	SpeedTest.RealConfig Configuration using the RealEvaluator
static class	SpeedTest.TabOutputter Print output tab separated.

Field Summary

int	nDeriv
int	num_itts
int	num_vals
protected SpeedTest.Outputter	outputter
protected long[]	totalTimes

Constructor Summary

SpeedTest(SpeedTest.Outputter outputter)

Method Summary

void	addConfig(SpeedTest.EvaluationConfig config) Adds a new EvaluationConfig to be be run for comparison.
void	doAll(java.lang.String[] eqns, java.lang.String[] varNames) Run speed comparison for a set of equations.
void	doAll(java.lang.String eqn, java.lang.String[] varNames) Run speed comparison for a single equation.
void	fini()
static java.lang.String	hornerExpression(java.lang.String varName, int nDeriv) Generate a string giving an approximation to log using Horner form "x*(1/1-x*(1/2-x*(1/3-x*(1/4 ...))))"
void	init()
static java.lang.String	lnExpression(java.lang.String varName, int nDeriv) Generate string giving approximation to log
static void	main(java.lang.String[] args) Main method, executes all speed tests.
static void	runTests(SpeedTest st) A standard set of tests.

Methods inherited from class java.lang.Object

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

Field Detail

num_itts

public int num_itts

num_vals

public int num_vals

nDeriv

public int nDeriv

outputter

protected SpeedTest.Outputter outputter

totalTimes

protected long[] totalTimes

Constructor Detail

SpeedTest

public SpeedTest(SpeedTest.Outputter outputter)

Parameters:

outputter -

Method Detail

init

public void init()

fini

public void fini()

doAll

public void doAll(java.lang.String eqn,
                  java.lang.String[] varNames)

Run speed comparison for a single equation.

Parameters:

eqn - The equation to test

varNames - an array of variable names which will be set to random values.

doAll

public void doAll(java.lang.String[] eqns,
                  java.lang.String[] varNames)

Run speed comparison for a set of equations.

Parameters:

eqns -

varNames -

addConfig

public void addConfig(SpeedTest.EvaluationConfig config)

Adds a new EvaluationConfig to be be run for comparison.

Parameters:

config -

lnExpression

public static java.lang.String lnExpression(java.lang.String varName,
                                            int nDeriv)

Generate string giving approximation to log

hornerExpression

public static java.lang.String hornerExpression(java.lang.String varName,
                                                int nDeriv)

Generate a string giving an approximation to log using Horner form "x*(1/1-x*(1/2-x*(1/3-x*(1/4 ...))))"

main

public static void main(java.lang.String[] args)

Main method, executes all speed tests.

Parameters:

args -

runTests

public static void runTests(SpeedTest st)

A standard set of tests.

Parameters:

st -