[GEM-dev] performance? was: same patch different ...

[IOhannes m zmoelnig]

Erich Berger wrote:
>> i know that the texture is 256x256 (thus: normalized), but Gem still
>> assumes that it is "rectangle" in order to benefit from some faster
>> transmissions.
> 
> 
> about the faster transmissions u mention:
> are they responsible for the following tabel ?
> 
> snap_size   :   256      512      1024
> 
> cpu in % pix_snap    :     5.3     61.9      98
> 
> cpu in%
> pix_snap2tex:     0        0         0
> 
> would there be such a huge difference between pix_snap and pix_snap2tex ?
> 

this is the reason why there is [pix_snap2tex] in the first place:
the bottle-neck with [pix_snap] is transferring the image from the
gfx-card's memory into main-memory; this is slow
if the data just stays on the gfx-card, this is _fast_

mfg.asdr
IOhannes