This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)

AbsoluteTiming

AbsoluteTiming[expr]
evaluates expr, returning a list of the absolute number of seconds in real time that have elapsed, together with the result obtained.
  • AbsoluteTiming is always accurate down to a granularity of $TimeUnit seconds, but on many systems is much more accurate.
  • AbsoluteTiming[expr] measures only the time involved in actually evaluating expr, not time involved in formatting the result.
Get the total time to do a computation:
Timing just reports CPU time used:
AbsoluteTiming takes into account all time, including getting data over the internet if needed:
The second time it is run is faster since the data has been saved for immediate reuse:
Get the total time to do a computation:
In[1]:=
Click for copyable input
Out[1]=
Timing just reports CPU time used:
In[2]:=
Click for copyable input
Out[2]=
 
AbsoluteTiming takes into account all time, including getting data over the internet if needed:
In[1]:=
Click for copyable input
Out[1]=
The second time it is run is faster since the data has been saved for immediate reuse:
In[2]:=
Click for copyable input
Out[2]=
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