Re: [pygame] simple pygame draw demo runs 3 times as slow as equivalent SDL2 program in Julia

[Peter Finlayson <frnknstn@xxxxxxxxxxx>]

Hi,

> Could it be simply because Julia is compiled and Python is interpreted

Yes... and no. Compiled vs interpreted is only part of the picture. I don't know 
Julia, but there are languages faster than Python.

> perhaps that SDL2 is faster than SDL1

Yes... and no. SDL2 is a LOT faster for some things that modern projects would 
try to do, and a slower for others.

Having said that, try this code instead. It should get you a lot closer to your 
3 second mark :) It uses pygame.gfxdraw to draw the boxes, which wraps the 
highly optimised SDL_gfx lib.


import pygame
from pygame.gfxdraw import box
import timeit

widthcell=5 # pixels
ncellswide=100
size = ncellswide*widthcell

pygame.init()
display = pygame.display.set_mode((size,size), pygame.HWSURFACE|pygame.DOUBLEBUF)

def run():
    color1=(105,105,0); color2=(0,0,150)
    for i in range(500):
        for row in range(ncellswide):
            for col in range(ncellswide):
                box(display, [row*widthcell, col*widthcell, \
widthcell-1,widthcell-1], color1)
        pygame.display.update()
        color1,color2=color2,color1

total_time = timeit.timeit('run()', 'from __main__ import run', number=1)
print(total_time," seconds")
pygame.quit()


The two changes are this


On 2019/06/11 21:40, David R wrote:
> Is there a better place to post this question?  Sorry if this isn't the right venue.
>
> Am I doing something wrong -- is there a way to make the following pygame 
> program run faster?
> It runs in 10.5 seconds, whereas an equivalent program invoking SDL2 from Julia 
> runs in 3.0 seconds (I'm happy to post the Julia code as well.)
> (I'm using pygame 1.9.4 via Anaconda in Windows 10 on a Lenovo Thinkpad T470p.)
> Could it be simply because Julia is compiled and Python is interpreted, or 
> perhaps that SDL2 is faster than SDL1?
>
> import pygame
> import timeit
>
> widthcell=5 # pixels
> ncellswide=100
> size = ncellswide*widthcell
>
> pygame.init()
> display = pygame.display.set_mode((size,size), pygame.HWSURFACE|pygame.DOUBLEBUF)
>
> def run():
>      color1=(105,105,0); color2=(0,0,150)
>      for i in range(500):
>          for row in range(ncellswide):
>              for col in range(ncellswide):
>                  pygame.draw.rect(display, color1, [row*widthcell, 
> col*widthcell, widthcell-1, widthcell-1])
>          pygame.display.update()
>          color1,color2=color2,color1
>
> total_time = timeit.timeit('run()', 'from __main__ import run', number=1)
> print(total_time," seconds")
> pygame.quit()