[cl-sdl-help] sdl:draw-pixel -- Why so slow?

[Jason D. <da...@en...>]

Has anyone else noticed draw-pixel being extremely slow?  I was
working on a raytracer and using draw-pixel to update the screen but
it takes WAY longer to do that than write to a file.  I even tried
writing to an off screen surface then blit'ing that.  But it's still
about 1000 or more times slower than anything else.  Even the CLX
package is faster....

Any suggestions?

Thanks,
Jason