Re: [lwip-users] Slow HTTP put request

[Sergio R. Caprile]

Yeap, the 100-continue issue explains what you see on your local tests.
This "issue" with curl is known, and certainly not its fault.
https://curl.haxx.se/mail/lib-2017-07/0013.html
Try `curl -H "Expect:"` to remove it, or even `curl -0` to fallback to
HTTP1.0; but it won't help in your real life scenario. We don't know if
that is what happens on your customer side.

You should capture the traffic on your customer premises to make sure
this is what's happening. I'm curious to know.