org.openjdk.jmh.annotations

Enum Mode

java.lang.Object

java.lang.Enum<Mode>

org.openjdk.jmh.annotations.Mode

All Implemented Interfaces:

Serializable, Comparable<Mode>

public enum Mode
extends Enum<Mode>

Benchmark mode.

Enum Constant Summary

Enum Constants

Enum Constant and Description
All Meta-mode: all the benchmark modes.
AverageTime Average time: average time per per operation.
SampleTime Sample time: samples the time for each operation.
SingleShotTime Single shot time: measures the time for a single operation.
Throughput Throughput: operations per unit of time.

Method Summary

Modifier and Type	Method and Description
static Mode	deepValueOf(String name)
static List<String>	getKnown()
String	longLabel()
String	shortLabel()
static Mode	valueOf(String name) Returns the enum constant of this type with the specified name.
static Mode[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

Throughput

public static final Mode Throughput

Throughput: operations per unit of time.

Runs by continuously calling Benchmark methods, counting the total throughput over all worker threads. This mode is time-based, and it will run until the iteration time expires.

AverageTime

public static final Mode AverageTime

Average time: average time per per operation.

Runs by continuously calling Benchmark methods, counting the average time to call over all worker threads. This is the inverse of Throughput, but with different aggregation policy. This mode is time-based, and it will run until the iteration time expires.

SampleTime

public static final Mode SampleTime

Sample time: samples the time for each operation.

Runs by continuously calling Benchmark methods, and randomly samples the time needed for the call. This mode automatically adjusts the sampling frequency, but may omit some pauses which missed the sampling measurement. This mode is time-based, and it will run until the iteration time expires.

SingleShotTime

public static final Mode SingleShotTime

Single shot time: measures the time for a single operation.

Runs by calling Benchmark once and measuring its time. This mode is useful to estimate the "cold" performance when you don't want to hide the warmup invocations, or if you want to see the progress from call to call, or you want to record every single sample. This mode is work-based, and will run only for a single invocation of Benchmark method.

Caveats for this mode include:

• More warmup/measurement iterations are generally required.
• Timers overhead might be significant if benchmarks are small; switch to SampleTime mode if that is a problem.

All

public static final Mode All

Meta-mode: all the benchmark modes. This is mostly useful for internal JMH testing.

Method Detail

values

public static Mode[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (Mode c : Mode.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static Mode valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

shortLabel

public String shortLabel()

longLabel

public String longLabel()

deepValueOf

public static Mode deepValueOf(String name)

getKnown

public static List<String> getKnown()