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 Documentation / Mathematica / Built-in Functions / Time and Date  /
SessionTime

  • SessionTime[ ] gives the total number of seconds of real time that have elapsed since the beginning of your Mathematica session.
  • SessionTime starts counting time as soon as your operating system considers your Mathematica process to be executing.
  • SessionTime is accurate only down to a granularity of at least $TimeUnit seconds.
  • See the Mathematica book: Section 2.13.3.
  • See also: TimeUsed, AbsoluteTime, Date.