Average response time
The following performances have been reported in local: web browser and UWS were on the same computer.
The average time between the client URL request and the server computation is about 3.5ms.
The average time between the response submission and the client reception is about 2.5ms.
The rest of the time is the time needed by Unreal to compute the callback function.
With simple functions, such as sending back a variable, you can easily reach below 5ms to receive a response.
Of course, if the web browser is on another computer, the network lag will be added to these values