>> help tic

 TIC Start a stopwatch timer.
    The sequence of commands
        TIC, operation, TOC
    prints the time required for the operation.
 
    See also TOC, CLOCK, ETIME, CPUTIME.

>> help toc

 TOC Read the stopwatch timer.
    TOC, by itself, prints the elapsed time since TIC was used.
    t = TOC; saves the elapsed time in t, instead of printing it out.
 
    See also TIC, ETIME, CLOCK, CPUTIME.

>> help etime

 ETIME  Elapsed time.
    ETIME(T1,T0) returns the time in seconds that has elapsed between
    vectors T1 and T0.  The two vectors must be six elements long, in
    the format returned by CLOCK:
 
        T = [Year Month Day Hour Minute Second]
 
    Here's an example of using ETIME to time an operation:
 
      t0 = clock;
      operation
      etime(clock,t0)
 
    Caution: As currently implemented, it won't work across month or year
    boundaries.  It is an M-file, so it can be fixed if you require this.
 
    See also TIC, TOC, CLOCK, CPUTIME.

>> help cputime

 CPUTIME CPU time in seconds.
    CPUTIME returns the CPU time in seconds that has been used
    by the MATLAB process since MATLAB started.  
 
    For example:
 
        t=cputime; your_operation; cputime-t
 
    returns the cpu time used to run your_operation.            
  
    The return value may overflow the internal representation
    and wrap around.
 
    See also ETIME, TIC, TOC, CLOCK

>> diary off