GetTickCount (API): InStr = 0 Like = 25 [milliseconds]
Timer (function): InStr = 0 Like = 0 [seconds]
QueryPerformanceCounter (API):
InStr - 0.4063
Like - 0.3523
Difference is 0.054 miliseconds

But in some cases, InStr is faster.

So I'm unsure, just givin' you some results from testin' it though .