System Function T

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⎕T - Return tick count since the operating system was started

The ⎕T system function returns the tick count in units of seconds of the running system. The precision of the result depends upon the operating system and underlying hardware.

⎕T is a niladic function, so it accepts no arguments.

For example:

      a←⎕T ⋄ ←((¯2+2*63x)/1)⍳0 1 ⋄ ⎕T-a
0.00008355929458048195

      ⎕T-⎕T
¯0.0000031892559491097927

As the above examples illustrate, ⎕T typically provides a very precise way of measuring execution time.


Note: T is a niladic form system function, you cannot assign a value to it.

System Variables (A value may be assigned to these except for ⎕DM)
ALX CT DM DT ELX FC FEATURE FPC IC IO
LX PP PR PW RL SA WSID
Niladic System Functions (a value cannot be assigned to these)
A AV EM ET LC NNAMES NNUMS SYSID SYSVER T
TC TCBEL TCBS TCESC TCFF TCHT TCLF TCNL TCNUL TS
WA
Monadic or dyadic system functions (a value cannot be assigned to these)
AT CR DC DL DR EA EC ERROR ES EX
FMT FX MF NAPPEND NC NCREATE NERASE NINFO NL NLOCK
NREAD NRENAME NREPLACE NRESIZE NSIZE NTIE NUNTIE STOP TF TRACE
UCS VR
Note that quad functions and variables are case insensitive


See Also
System Commands System Variables and Functions Operators
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