Re: Is it possible to change the recv buffer size dynamically for network process or subprocess?

[Robert Pluim <rpluim@gmail.com>]

>>>>> On Sun, 22 Mar 2020 09:26:37 +0800, HaiJun Zhang <netjune@outlook.com> said:

    HaiJun> I want to do flow control, because too many data may cause UI
    HaiJun> unresponsive. Set the recv buffer size to 4, and if I don’t fetch the
    HaiJun> four bytes, please don’t receive more data. If the size (In the four
    HaiJun> bytes header) is too big, ask the user if the message should be
    HaiJun> received.

I donʼt see how this is any different from just doing recv, checking
the 4 bytes, and then asking the user. In any case, if the remote end
has sent you the message, it will be in the local kernel buffers
anyway, so you'll have to read it at some point anyway.

Anyway, emacs-27 has read-process-output-max, which I guess you could
set to 4, but I suspect that will cause all sorts of other issues.

Robert