Round trip over HTTP on the same machine (client and server in one JVM), median of 20 requests.

   1 text(s) per request:   17.6 ms per request,  17.6 ms per text
   4 text(s) per request:   31.7 ms per request,   7.9 ms per text
  16 text(s) per request:   80.0 ms per request,   5.0 ms per text
  64 text(s) per request:  297.2 ms per request,   4.6 ms per text

100 requests of 1 text: one client after another 1.7 s (59 requests/s), 4 clients at once 1.4 s (70 requests/s)
