Returns the number of processor cycles.
x = _RDTSC
| x | : int64 |
With the function _RDTSC it is possible to determine how many cycles your program needs to do something by calling the state of the Time Stamp Counter (TSC).
OpenW 1
Local Large l1, l2, l3, l4
Local i As Large, x%
For i = 1 To 20
l1 = _RDTSC : l2 = _RDTSC
l3 = _RDTSC : l4 = _RDTSC
Print l2 - l1; l3 - l2; l4 - l3
Next
Do : Sleep : Until Win_1 Is Nothing
Since the introduction of the Pentium, the processor provides the cycle counter in an internal 64-bit register. The counter is reset each time the computer is switched on.
$StepOff
OpenW 1
Global a$, l As Large, s$, sum As Int, t As Double
Local i As Register Int
s$ = Space$(100000)
t = Timer : l = _RDTSC : sum = 0
For i = 1 To Len(s$)
a$ = Mid$(s$, i, 1)
sum += Asc(a$)
Next
l = _RDTSC - l : t = Timer - t
Print "Number of cycles: "; l
Print "Time in seconds: "; t
Do : Sleep : Until Me Is Nothing
{Created by Sjouke Hamstra; Last updated: 13/06/2022 by James Gaite}