Benchmark/performance question

[kexisse]

I have made a (very) simple benchmarking .love project, with 500 bouncing images.
I think my game will have many hundreds of sprites in it, so I wanted to check performance before starting.

To use the tool:

• Turn the sets of images on and off with number keys 1-5.
• Toggle FSAA between 0 and 2 with "F" key

On my macbook, and without FSAA, I get ~15fps with all layers, ~50fps will all layers other than layer #4, and ~160fps with single layers (other than #4). With FSAA on, I get < 10fps with all layers, and 20-30 with a few layers, but always less than 40fps.

I have some questions:

• Are there any techniques in my code I'm missing that could improve the framerate?
• One image in particular, number 4 (the weird aardvark-looking one), affects the framerate significantly. It is slightly larger than the others, but I can't tell why it has such a negative affect on the framerate. Can anyone explain?
• FSAA completely destroys my framerate. Why? Are there alternatives? Do I really need it when just rendering pngs? I couldn't see a noticeable difference in quality.

For simplicity, the part of the draw loop that renders the images is as follows:

Code: Select all

  for index, image in ipairs(images) do
    if show[image.img_num] then
      love.graphics.draw(image.img, image.x, image.y, image.rot, 1, 1, image.img:getWidth() / 2, image.img:getHeight() / 2)
    end
  end

[Zeliarden]

Yo!

with 500 bouncing images.

its 834 (167 per image) bouncing images in your attached love file

I think my game will have many hundreds of sprites in it, so I wanted to check performance before starting.

I wouldnt worry about it, just make your game

One image in particular, number 4 (the weird aardvark-looking one), affects the framerate significantly. It is slightly larger than the others, but I can't tell why it has such a negative affect on the framerate. Can anyone explain?

Code: Select all

image 4 = 842x595 = 500990 pixels
other images = 256x256 = 65536 pixels
500990/65536 = 7,644500732421875 times more pixels

FSAA completely destroys my framerate. Why?

your graphics card probably have poor support for FSAA

Do I really need it when just rendering pngs? I couldn't see a noticeable difference in quality.

then you dont need it

[Xgoff]

the aardvark one isn't power-of-two which will cause problems with some graphics cards. those that are ok with them will probably still have performance issues with them.

iirc love 0.8 (if you're using that) will automatically pad the image but since the image is going to be larger that will probably be more expensive anyway

[Lafolie]

I wish the bouncing fireflowers was a screensaver.