Kestrel only supports 1 thread currently. I've included single threaded mode Haywire benchmarks and multi-threaded mode benchmarks for comparisons.
Running 10s test @ http://192.168.0.101:5000
8 threads and 32 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 71.50ms 41.78ms 212.21ms 39.50%
Req/Sec 1.70k 534.07 3.80k 77.39%