Messages

1

General discussions / Benchmark : SDL vs SFML

« on: September 11, 2008, 09:47:44 am »

This highly depends on the system you test with.

I think you don not understand me.
I simply wanted to say that your SDL test is not correct.
I perform the test with and without  SDL_DisplayFormat() on ONE computer. SDL test without SDL_DisplayFormat() was MUCH slower then SFML.

My hardware:

AMD Athlon X2 3800+  
GeForce 6100
Windows XP

As I see in SDL documentation SDL_DisplayFormat() is necessary to optimize bitmap blitting and that function call is recommended in all SDL tutorials.

I did not test sprite rotation and test drawing, but I think that sprite rotation will be slower in SDL even with my optimization because  SDL_gfx rotate image using CPU not GPU.

I like SFML more than SDL, but I think you have to change your SDL test code to show more truthful results.

2

General discussions / Benchmark : SDL vs SFML

« on: September 10, 2008, 05:35:30 pm »

I have made some optimization of SDL code by adding SDL_DisplayFormat() calls after image loading:

for( int i = 0; i < 5; ++i ) Images = SDL_DisplayFormat(Images);

After that I have very interesting results:

1/ Test : sprites
SDL  displayed 35 frames
SFML displayed 32 frames
--> SFML is 91% faster than SDL

2/ Test : alpha-blended sprites
SDL  displayed 25 frames
SFML displayed 31 frames
--> SFML is 124% faster than SDL

As you can see sprites drawing without alpha using SDL is faster then using SFML.