Timer

Represents a timer, for timing a function. Call the time function, passing the function to time.

For recording metrics the Timer either uses the passed-in MetricsRecorder if it is defined, or it looks in the Metrics.Recorder field for a recorder. If neither of these are defined then no metrics are recorded (the function is executed without recording metrics).

The overhead of recording metrics has been measured at around 100 nanoseconds on an Intel i7-3720QM. The overhead of calling the time method when no metrics are being recorded (a recorder is not defined) is negligible.

Note: This class needs to be in the org.apache.spark.rdd package, otherwise Spark records somewhere in the time method as the call site (which in turn becomes the stage name). This can be fixed when Spark 1.1.1 is released (needs SPARK-1853).

Linear Supertypes

Serializable, Serializable, AnyRef, Any

Instance Constructors

new Timer(name: String, clock: Clock = new Clock(), recorder: Option[MetricsRecorder] = None, sequenceId: Option[Int] = None, isRDDOperation: Boolean = false)

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def time[A](f: ⇒ A): A

Runs f, recording its duration, and returns its result.
val timerName: String
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

Related Doc: package rdd

class Timer extends Serializable

Instance Constructors

new Timer(name: String, clock: Clock = new Clock(), recorder: Option[MetricsRecorder] = None, sequenceId: Option[Int] = None, isRDDOperation: Boolean = false)

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def time[A](f: ⇒ A): A

val timerName: String

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped