[chmod775]

With basic analog you could set it up in a way where you would just wait for the next frame (or don't even wait that long), but with the new digital stuff there's bootstrapping/handshaking - whatever you want to call it. It's not so simple anymore.

[lostdog]

What could they possibly be doing that takes 4 seconds? That's ~4,000,000,000 instructions on a typical embedded processor.

It's much more likely that the handshaking was implemented by an incompetent organization that doesn't care about quality.

[MichaelZuo]

It is extremely odd to see so many people in this thread ignore that a handshake requires billions of instructions to be executed for some reason....

[eurasiantiger]

One of the grandparents of this comment thread explicitly ignored it; this is a discussion on frame buffering.