你们看下面的枚举值，有啥意义呢

shengrendan2

Enumerator:
BeforeSwapBuffers   
AfterSwapBuffers  


这个说的之前和之后是要干啥

shengrendan2

AfterSwapBuffers may result in slightly higher framerates, but may lead to inconsistent swapping between different windows. BeforeSwapBuffers may lead to slightly lower framerate, but improve consistency in timing of swap buffers, especially important if you are likely to consistently break frame.

array

我已经在《最长的一帧》中予以详细介绍了，抱歉这里我不想再复述一遍。