RE: [GD-Windows] More timer fun!

[Jon W. <hp...@mi...>]

> and that we can apparently fix this within our games with enough work,
> Microsoft should integrate fixes for this into their current and 
> past OS's.

QueryPerformanceCounter() is slow enough already (on the order of 1 
microsecond because of the bus transaction involved). Fixing it is 
decidedly non-trivial, and, at a minimum, requires doubling the cost 
of calling it. I think most people who use these functions would 
rather not take the additional cost hit.

RDTSC doesn't skip, that I've heard of. It's absolutely the right 
thing to use for profiling and similar measurements. The only 
weakness of it is that it may not measure wall-clock time accurately 
on laptops (that use TimeStep CPUs). I'm prepared to live with that 
on a local scale, and to use an unholy heuristic trio of 
QPC/timeGetTime()/RDTSC for keeping track of wallclock time on a 
global scale.

Cheers,

				/ h+