evaluates expr repeatedly and returns a list of the average time in seconds used, together with the result obtained.


does repeated evaluation for at least t seconds.


  • RepeatedTiming has attribute HoldFirst.
  • RepeatedTiming[expr;] will give {timing,Null}.
  • The value of expr returned by RepeatedTiming comes from the first evaluation of expr made by RepeatedTiming.
  • RepeatedTiming always evaluates expr at least four times. It gives a trimmed mean of the timings obtained, discarding lower and upper quartiles.
  • RepeatedTiming gives a result whose precision is typically between one and three digits, reflecting both variance in timing results and underlying precision of the operating system clock.
  • RepeatedTiming measures "wall clock time" and is subject to the same limitations as AbsoluteTiming.
  • RepeatedTiming[expr] uses a total time that is scaled based on initial measurements of the evaluation time for expr.


Basic Examples  (2)

Time a simple addition:

Time a more complex operation:

Specify that at least one second should be used to time the operation:

Wolfram Research (2015), RepeatedTiming, Wolfram Language function,


Wolfram Research (2015), RepeatedTiming, Wolfram Language function,


Wolfram Language. 2015. "RepeatedTiming." Wolfram Language & System Documentation Center. Wolfram Research.


Wolfram Language. (2015). RepeatedTiming. Wolfram Language & System Documentation Center. Retrieved from


@misc{reference.wolfram_2024_repeatedtiming, author="Wolfram Research", title="{RepeatedTiming}", year="2015", howpublished="\url{}", note=[Accessed: 17-July-2024 ]}


@online{reference.wolfram_2024_repeatedtiming, organization={Wolfram Research}, title={RepeatedTiming}, year={2015}, url={}, note=[Accessed: 17-July-2024 ]}