We have cloud hosted JSON Web API for MT4/MT5.
During this weekend we have done some job and performance gained dramatically.
Please have a look to the statistics, here you see how significantly response time reduced:

This screenshot shows previous time range statistics, pay attention to percentiles:

After update graphs look like:
In other words,
99% of requests will complete during 76ms,
95% of requests - during 24ms,
if you are lucky, 50% of the time - you will get response during 9.7ms.
Feel free to join our first in the class cloud hosted MT4/MT5 JSON Web API at: https://MyWebAPI.com