Timer

Timer trait measures the performance of code blocks. Extend this trait and wrap the code to measure with time(code_name){ ... }:

class A extends Timer {
  val t : TimeReport = time("performance test") {
    // write any code here
    block("A") {
      // code A
    }
    block("B") {
     // code B
    }
  }
  // report elapsed time of A, B and the total running time
  println(t)

  t("A").average // the average of running time of code block "A" (min and max are also available)
}

Timer can take the average of repetitive executions:

class Rep extends Timer {

  // Repeat 10 times the evaluation of the whole block
  val t = time("repetitive evaluation", repeat=10) {
     // This part will be executed 1000 x 10 times
     block("A", repeat=1000) {
       // code A
     }

     // This part will be executed 1000 x 10 times
     block("B", repeat=1000) {
       // code B
     }
  }

  println(t)

  // Which code is faster?
  if(t("A") <= t("B"))
     println("A is faster")
  else
     println("B is faster")
}

When measuring Scala (Java) code performances, you should take the average of execution times and reorder the code block execution orders, because JVM has JIT compiler, which optimizes the code at runtime. And also cache usage and the running state of the garbage core (GC) affects the code performance. By repeating the executions of the entire or individual blocks with the repeat option, you can avoid such pitfalls of benchmarking.

Linear Supertypes

Serializable, Serializable, AnyRef, Any

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 block[A](name: String)(f: ⇒ A): TimeReport

Attributes
protected
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
def reportLog(m: TimeReport, logLevel: LogLevel): Unit

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

Definition Classes
AnyRef
def time[A](blockName: String, logLevel: LogLevel = INFO, repeat: Int = 1, blockRepeat: Int = 1)(f: ⇒ A): TimeReport

Measure the execution time of the code block
Measure the execution time of the code block
repeat
the number of repetitive execution

Attributes
protected
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 io

trait Timer extends Serializable

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def block[A](name: String)(f: ⇒ A): TimeReport

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

def reportLog(m: TimeReport, logLevel: LogLevel): Unit

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

def time[A](blockName: String, logLevel: LogLevel = INFO, repeat: Int = 1, blockRepeat: Int = 1)(f: ⇒ A): TimeReport

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