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$TimeUnit
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$TimeUnit

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gives the minimum time interval in seconds recorded on your computer system.

Details

  • Typical values for $TimeUnit are 1/100 and 1/1000.
  • $TimeUnit determines the minimum granularity of measurement in functions like Timing and DateList.
  • In some functions the actual time granularity may be much smaller than $TimeUnit.

Examples

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

The timing granularity on this machine:

In[1]:=1
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https://wolfram.com/xid/0b0m6alvk7i-hu4zbe
Out[1]=1

When a computation takes less than $TimeUnit seconds, repeat to get a better timing:

In[1]:=1
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https://wolfram.com/xid/0b0m6alvk7i-dcni0n
Out[1]=1
In[2]:=2
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https://wolfram.com/xid/0b0m6alvk7i-hcyapv
Out[2]=2
In[3]:=3
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https://wolfram.com/xid/0b0m6alvk7i-jz010
Out[3]=3

Divide by the number of repetitions to get the average timing:

In[4]:=4
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https://wolfram.com/xid/0b0m6alvk7i-ck16qp
Out[4]=4

You may want to time just a part of the computation:

In[5]:=5
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https://wolfram.com/xid/0b0m6alvk7i-d8dmea
Out[5]=5
Wolfram Research (1991), $TimeUnit, Wolfram Language function, https://reference.wolfram.com/language/ref/$TimeUnit.html (updated 2003).
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Wolfram Research (1991), $TimeUnit, Wolfram Language function, https://reference.wolfram.com/language/ref/$TimeUnit.html (updated 2003).

Text

Wolfram Research (1991), $TimeUnit, Wolfram Language function, https://reference.wolfram.com/language/ref/$TimeUnit.html (updated 2003).

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Wolfram Research (1991), $TimeUnit, Wolfram Language function, https://reference.wolfram.com/language/ref/$TimeUnit.html (updated 2003).

CMS

Wolfram Language. 1991. "$TimeUnit." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2003. https://reference.wolfram.com/language/ref/$TimeUnit.html.

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Wolfram Language. 1991. "$TimeUnit." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2003. https://reference.wolfram.com/language/ref/$TimeUnit.html.

APA

Wolfram Language. (1991). $TimeUnit. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$TimeUnit.html

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Wolfram Language. (1991). $TimeUnit. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$TimeUnit.html

BibTeX

@misc{reference.wolfram_2025_$timeunit, author="Wolfram Research", title="{$TimeUnit}", year="2003", howpublished="\url{https://reference.wolfram.com/language/ref/$TimeUnit.html}", note=[Accessed: 25-March-2025 ]}

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@misc{reference.wolfram_2025_$timeunit, author="Wolfram Research", title="{$TimeUnit}", year="2003", howpublished="\url{https://reference.wolfram.com/language/ref/$TimeUnit.html}", note=[Accessed: 25-March-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_$timeunit, organization={Wolfram Research}, title={$TimeUnit}, year={2003}, url={https://reference.wolfram.com/language/ref/$TimeUnit.html}, note=[Accessed: 25-March-2025 ]}

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@online{reference.wolfram_2025_$timeunit, organization={Wolfram Research}, title={$TimeUnit}, year={2003}, url={https://reference.wolfram.com/language/ref/$TimeUnit.html}, note=[Accessed: 25-March-2025 ]}