Why is the data transfer speed from the server being cut during the stream?

Question

C++ / C#

There is ASP. NET application running on a VPS server. (Channel width 200 Mb/s). It works as follows: data is transferred from the client to the server and immediately to the browser (about 1.5 mb / s). When I run it on IIS Express, everything works as expected, but when sending to a remote server, the sending speed is cut, while the receiving speed remains at the level (1.5mb / s).

There is only one answer - the problem is in the VPS server, but as soon as I stop sending data, the sending speed rises to the desired 1.5 mb / s. I've been struggling with this problem for over a month now. Changed hosting provider but does not help. What's the matter ??

Tried different VPS configurations. Up to 5 cores, 10 GB of RAM and 1 GB / s channel width. Even on the most powerful configuration, the problem is the same.

SignalR is used for data transfer (with WebSocket Enforcement). The site is hosted on IIS.

Answer 1

After some searching, I came to the conclusion that something should be used instead of web sockets. Because they use the TCP protocol for themselves, which apparently causes a delay on a remote server. Since there is zero packet loss when sending data to the local IIS, it is clear why everything works locally for me.