title: Very simple PyGame very slow
body: <p>I want to make a (a bit bigger) game in PyGame, but even with this simple code I just get arround 10 fps instead of 60? Here's the code:</p>
  
  <pre><code>import pygame
  
  res = 1280,720
  display = pygame.display.set_mode(res, pygame.RESIZABLE)
  pygame.display.set_caption("Test")
  
  
  background = pygame.transform.smoothscale(pygame.image.load("Background.png"), res)
  a = 0
  while True:
      pygame.time.Clock().tick(60)
      display.fill((0,0,0))
      a += 10
  
      display.blit(background, (0,0)) #Without this line: arround 20 fps
  
      pygame.draw.rect(display,(255,0,0), (a,8,339,205))
  
      pygame.display.update()
  
  pygame.quit()
  </code></pre>
  
  <p>What am I doing wrong?</p>
  
  <p>Thank you!</p>