Package org.apache.calcite.util

Class Benchmark

java.lang.Object

org.apache.calcite.util.Benchmark

public class Benchmark
extends java.lang.Object

Helps to run benchmarks by running the same task repeatedly and averaging the running times.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Benchmark.Statistician	Collects statistics for a test that is run multiple times.

Field Summary

Fields

Modifier and Type	Field	Description
private Function1<Benchmark.Statistician,java.lang.Void>	function
static org.slf4j.Logger	LOGGER	Certain tests are enabled only if logging is enabled at debug level or higher.
private int	repeat
private Benchmark.Statistician	statistician

Constructor Summary

Constructors

Constructor	Description
Benchmark(java.lang.String description, Function1<Benchmark.Statistician,java.lang.Void> function, int repeat)

Method Summary

Modifier and Type	Method	Description
static boolean	enabled()	Returns whether performance tests are enabled.
(package private) static long	printDuration(java.lang.String desc, long t0)
void	run()

Methods inherited from class java.lang.Object

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

Field Detail

LOGGER

public static final org.slf4j.Logger LOGGER

Certain tests are enabled only if logging is enabled at debug level or higher.

function

private final Function1<Benchmark.Statistician,java.lang.Void> function

repeat

private final int repeat

statistician

private final Benchmark.Statistician statistician

Constructor Detail

Benchmark

public Benchmark(java.lang.String description,
                 Function1<Benchmark.Statistician,java.lang.Void> function,
                 int repeat)

Method Detail

enabled

public static boolean enabled()

Returns whether performance tests are enabled.

printDuration

static long printDuration(java.lang.String desc,
                          long t0)

run

public void run()