To increase performance depends on many factor.
If you write the all the data from one client one by one record and you have a latency of 5 ms on your Internet connection (which would be pretty good), then with 200 records * 5 ms = 1000 ms then the latency already eats up the time.
Consider to insert records batch wise, e.g. always 10 records at ones, which increase the pass througth already by factor 10.