What slow codea down more, images or shapes?

Questions
1

I’ve had a question in my head for awhile, what would slow done codea more, a rectangle or a image?

2

That depends on the size of the image and the rectangle. Is the rectangle filled with a color. There are quite a few variables that aren’t being told.

3

Oh sorry, lets say the rectangle has a color in it, and lets say the sprite is a resized
1 x 1, stretched to 20 by 20, and its tinted.

4

I dont know if this is accurate or not, but this executes a sprite command 10,000 times and then executes a rect command 10,000 times. The sprite image and rectangle are both 101x171. The images won’t show, but the time it takes to execute each is printed in seconds. Here are the values I get on my iPad1. This takes about 12 seconds to run.


image  	0.177628
rect  	1.50384

The rect command takes about 9 times longer.


function setup()
    img=readImage("Planet Cute:Character Boy")
    w=WIDTH/2
    h=HEIGHT/2
    run=1
end

function draw()
    background(40, 40, 50)
    if run==1 then
        image1()
        run=2
    end
    if run==2 then
        rect1()
        run=3
    end
end

function rect1()
    a=os.clock()
    for z=1,10000 do
        rect(w,h,101,171)
    end
    b=os.clock()
    print("rect  ",b-a)
end

function image1()
    a=os.clock()
    for z=1,10000 do
        sprite(img,w,h)
    end
    b=os.clock()
    print("image  ",b-a)
end
5

Ok, thanks! :slight_smile:

6

@dave1707 it will also depend on whether you are using smooth() / noSmooth().

I expect that noSmooth() rects are the fastest, but still slower than sprites in your benchmark (you are drawing sprites in such a way that they will be batched into a single draw call, a very optimal scenario).

7

@Simeon Now I’m confused. I re-ran the above program 10 times and averaged the values. I changed the rect and sprite lines to use math.random(WIDTH) and math.random(HEIGHT) instead of using the fixed w and h values. I ran that code 10 times and averaged the values. These are the results using fix values and math.random(). The time increased for both of them, but more for the image. And adding math.random() didn’t seem to matter that much over the fixed values.


fixed
image   0.165703
rect   1.22362

math.random
image   0.198421
rect   1.22489