Replay without delay

I want replay responses in regular mode, but without or with custom delays. Is there any way to do it with mitmproxy? I just have found how to replay file in regular mode (not easy peasy!) and stuck on delay thing.

I’ve installed 4.0 today, and do not see any delays now. Probably I was wrong about source of this delays :slight_smile: If want to add any, that I should do?