double precision performance penalty ?

gjaegy
Posts: 178
Joined: Fri Apr 18, 2008 2:20 pm

double precision performance penalty ?

Post by gjaegy »

Hi guys,

I hit an assert when building the static mesh shape for a relatively huge world (precision issue), so I might switch to the double precision mode.

I have observed that using double precision would disable SSE usage - mostly in the broadphase implementation - so I am affraid that performance will suffer noticeably..

Two questions :

1 - Has anyone benchmarked Bullet when using double precision mode, and compared the results against a single precision build ?

2 - Couldn't one imagine using double precision SSE2 instructions as well ?

Thanks a lot,

Cheers,
Gregory