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wall time

wall time: n. (also `wall clock time') 1. `Real world' time (what
   the clock on the wall shows), as opposed to the system clock's idea
   of time.  2. The real running time of a program, as opposed to the
   number of ticks required to execute it (on a timesharing
   system these always differ, as no one program gets all the
   ticks, and on multiprocessor systems with good thread support
   one may get more processor time than real time).