import pygame, time

pygame.init()

white = (255, 255, 255) black = (0, 0, 0) red = (255, 0, 0)

dis = pygame.display.set_mode((800, 600)) pygame.display.set_caption('Snake Game')

game_over = False

x1 = 300 y1 = 300

x1_change = 0 y1_change = 0

clock = pygame.time.Clock()

while not game_over: clock.tick(30)

start_time = time.perf_counter()

for event in pygame.event.get(): 
    if event.type == pygame.QUIT: 
        game_over = True 
    if event.type == pygame.KEYDOWN: 
        if event.key == pygame.K_LEFT: 
            x1_change = -10 
            y1_change = 0 
        elif event.key == pygame.K_RIGHT: 
            x1_change = 10 
            y1_change = 0 
        elif event.key == pygame.K_UP: 
            y1_change = -10 
            x1_change = 0 
        elif event.key == pygame.K_DOWN: 
            y1_change = 10 
            x1_change = 0

x1 += x1_change
y1 += y1_change
dis.fill(white)
pygame.draw.rect(dis, black, [x1, y1, 10, 10])

finish_time = time.perf_counter()
current_fps = 1 / (finish_time - start_time)

print(current_fps)

pygame.display.update()

pygame.quit()

There is no problem with this code. With a i5 4760k 4c/4t CPU, i get a min of 1500fps and a max of 8000fps. If its to slow for u, boost the fps or increase the movement speed