進捗です。1w: main: Unix.Unix_error(Unix.ECONNRESET, "read", "")とは？

gistfile1.txt

$ wrk -t12 -c400 -d30s http://localhost:9000/
Running 30s test @ http://localhost:9000/
  12 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    10.92ms    1.86ms  23.20ms   91.61%
    Req/Sec     2.44k   745.81     3.65k    65.37%
  655855 requests in 30.09s, 56.29MB read
  Socket errors: connect 157, read 56, write 13, timeout 0
Requests/sec:  21799.25
Transfer/sec:      1.87MB