Python 为什么我的pygame游戏在显示矩形时会丢失帧？

我试图编写一个简单的游戏，这个游戏有一个玩家对象和一个使用循环创建的地板。我不知道为什么它的帧丢失得这么快。我有时钟滴答60帧，但很快下降到15帧。提前谢谢

main.py

black = (0, 0, 0)
blue = (50, 60, 200)
white = (255, 255, 255)
font = pygame.font.Font(None, 30)

window = pygame.display.set_mode((800, 600))
pygame.display.set_caption("Platformer")

gravity = -0.5

player = Player(400, 0)

level1 = [
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
    [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]


]

    for y in range(0, len(level1)):
        for x in range(0, len(level1[y])):
            if level1[y][x] == 1:
                blockList.append(Block(x*32, y*32))

    window.fill(blue)

    for block in blockList:
        block.render(window)

    player.x += moveX

    player.update(gravity, blockList)
    player.render(window)

    clock.tick(60)

---

这里有一个很好的学习点。优化代码的第一步是从循环中去掉不必要的数学运算。正如在评论中所建议的，如果您在每个帧计算中运行那个双循环，它可能会大大降低您的速度。也许其他事情也是如此

让我们假设您的“级别1”块没有在帧之间更改。因此，我们可以在开始循环之前计算黑名单

# make blocklist
level1= [[0,0, ... , 0],
              ...
         [1,1, ... , 1]]

blocklist = []
for y ...
  for x ...
    blocklist.append(...)

# now start your frame loop
while True:
  window.fill()
  for block in blocklist:
    ...
  clock.tick(60)

---

您是否在每帧

level1

上进行双循环？在进入主循环之前，也许可以将其移动到初始化部分。我该如何做？抱歉，我是Python的新手。您需要编辑您的问题以包含整个代码，或者至少包括主循环。如果没有大部分代码，就不可能建议更改。双循环是二次时间的一个例子。对不起，stackoverflow是个新手，甚至不知道如何正确设置问题的格式

# make blocklist
level1= [[0,0, ... , 0],
              ...
         [1,1, ... , 1]]

blocklist = []
for y ...
  for x ...
    blocklist.append(...)

# now start your frame loop
while True:
  window.fill()
  for block in blocklist:
    ...
  clock.tick(60)