org.openjdk.jmh.annotations

Annotation Type Param

@Inherited
@Target(value=FIELD)
@Retention(value=RUNTIME)
public @interface Param

Marks the configurable parameter in the benchmark.

Param fields should be non-final fields, and should only reside in in State classes. JMH will inject the value into the annotated field before any Setup method is called. It is not guaranteed the field value would be accessible in any initializer or any constructor of State.

Parameters are acceptable on any primitive type, primitive wrapper type, a String, or an Enum. The annotation value is given in String, and will be coerced as required to match the field type.

Parameters should normally provide the default values which make benchmark runnable even without the explicit parameters set for the run. The only exception is Param over Enum, which will implicitly have the default value set encompassing all enum constants.

When multiple Param-s are needed for the benchmark run, JMH will compute the outer product of all the parameters in the run.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
String[]	value Default values sequence for the parameter.

Element Detail

value

public abstract String[] value

Default values sequence for the parameter. By default, the parameter values will be traversed during the run in the given order.

Returns:

values sequence to follow.

Default:

"blank_blank_blank_2014"