[const_cast]

It’s trivial to achieve under 100ms in the US with even just one server.

Most companies aren’t international.

[ummonk]

Without keep-alive, any HTTPS request requires multiple round trips to complete.

[ndriscoll]

Fortunately every browser made in the last 25 years supports keepalive. e.g. Firefox (and according the the reporter of this bug, Chrome) won't even let you disable it[0].

[0] https://bugzilla.mozilla.org/show_bug.cgi?id=879002