PureBasic Forums - English

Okay, this fascinated me, so I actually registered here (and bought PB) just to try it and comment.

I have two machines, with three video hardware choices. One machine has nVidia and Intel graphics, one has AMD. Using WHQL drivers for all three.

Using a near variant of this example, I get:

nVidia: ~570 circles per frame for about 4 seconds, ~400 for about 4 seconds, then 240 or so for at least 20 seconds.
ATI: ~640 circles per frame. No dropoff in at least 30 seconds.
Intel HD: ~2100 circles per frame. No dropoff.

If I change to OpenGL, I get:
nVidia: ~7000 circles per frame. No dropoff.
ATI: ~4k circles per frame. No dropoff.
Intel HD: ~6k circles per frame. No dropoff.

Specific hardware:
nVidia: GeForce 670 GTX, factory-overclocked board.
ATI: Radeon HD 6950, 2GB. Might be factory-overclocked but not by much.
Intel: Intel HD Graphics 4000. Not overclocked that I know of.

The Intel system is a recentish Core i7, the AMD system is a Bulldozer 6100 or so (6 core, 3.3GHz).

Note: I play video games on both of these systems (though not using the Intel HD graphics, that's for a second monitor running shells when I'm programming). On neither do I see results that make me think that I'm suffering from a factor of five performance penalty for running games under DirectX.

DirectX9 commands are using 3D, even for 2D stuff. OpenGL, surely not. You could also try DirectX7 subsystem.

Hmm time is always 0.0? Number of Circles is consistently above 9000.

WinXP SP3
CPU: Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz
DirectX version: 9.0c
GPU: nVidia GeForce 7900 GT GDDR3 256MB