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RepeatedTiming
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RepeatedTiming

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

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RepeatedTiming[expr,t]

does repeated evaluation for at least t seconds.

Details

  • 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.

Examples

Basic Examples  (2)Summary of the most common use cases

Time a simple addition:

In[1]:=1
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https://wolfram.com/xid/05ftnig09w-1yzwm0
Out[1]=1

Time a more complex operation:

In[2]:=2
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https://wolfram.com/xid/05ftnig09w-proo2y
Out[2]=2

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

In[1]:=1
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https://wolfram.com/xid/05ftnig09w-hjs9hd
Out[1]=1
Wolfram Research (2015), RepeatedTiming, Wolfram Language function, https://reference.wolfram.com/language/ref/RepeatedTiming.html.
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Wolfram Research (2015), RepeatedTiming, Wolfram Language function, https://reference.wolfram.com/language/ref/RepeatedTiming.html.

Text

Wolfram Research (2015), RepeatedTiming, Wolfram Language function, https://reference.wolfram.com/language/ref/RepeatedTiming.html.

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Wolfram Research (2015), RepeatedTiming, Wolfram Language function, https://reference.wolfram.com/language/ref/RepeatedTiming.html.

CMS

Wolfram Language. 2015. "RepeatedTiming." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/RepeatedTiming.html.

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Wolfram Language. 2015. "RepeatedTiming." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/RepeatedTiming.html.

APA

Wolfram Language. (2015). RepeatedTiming. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/RepeatedTiming.html

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Wolfram Language. (2015). RepeatedTiming. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/RepeatedTiming.html

BibTeX

@misc{reference.wolfram_2025_repeatedtiming, author="Wolfram Research", title="{RepeatedTiming}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/RepeatedTiming.html}", note=[Accessed: 20-June-2025 ]}

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@misc{reference.wolfram_2025_repeatedtiming, author="Wolfram Research", title="{RepeatedTiming}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/RepeatedTiming.html}", note=[Accessed: 20-June-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_repeatedtiming, organization={Wolfram Research}, title={RepeatedTiming}, year={2015}, url={https://reference.wolfram.com/language/ref/RepeatedTiming.html}, note=[Accessed: 20-June-2025 ]}

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@online{reference.wolfram_2025_repeatedtiming, organization={Wolfram Research}, title={RepeatedTiming}, year={2015}, url={https://reference.wolfram.com/language/ref/RepeatedTiming.html}, note=[Accessed: 20-June-2025 ]}