[Bug 2848] Adding an option to control Nagle's algorithm (enable/disable) can lead to significant speedups

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=2848

--- Comment #2 from Thanassis Tsiodras <ttsiodras at gmail.com> ---
@Kristian: Unless I am mistaken, that post argues from the other side -
that of a fast link, where they *want* to disable Nagle. As you can see
in my case (slow wifi link), enabling Nagle dramatically increases the
transfer bandwidth...

...which basically reinforces why we need to have this option as a
user-configurable one: as is right now, the call to setsockopt that
enables TCP_NODELAY is unconditional. IMHO it shouldn't be - the
end-user should be able to control this, so that when SSH is used for
transport, users with fast links can choose to disable Nagle - and
users like me (with slow links) can enable it and avoid wasting
bandwidth by sending half-empty packets.

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