I have add some time statistics just like AB.

[lxu4net]

liangxu@master:~/git/weighttp$ ./build/default/weighttp -n 1000000 -c 2048 -t 4 "http://127.0.0.1:9000/test"
weighttp - a lightweight and simple webserver benchmarking tool

starting benchmark...
spawning thread #1: 512 concurrent requests, 250000 total requests
spawning thread #2: 512 concurrent requests, 250000 total requests
spawning thread #3: 512 concurrent requests, 250000 total requests
spawning thread #4: 512 concurrent requests, 250000 total requests
progress:  10% done
progress:  20% done
progress:  30% done
progress:  40% done
progress:  50% done
progress:  60% done
progress:  70% done
progress:  80% done
progress:  90% done
progress: 100% done

finished in 21 sec, 138 millisec and 418 microsec, 47307 req/s, 12981 kbyte/s
requests: 1000000 total, 1000000 started, 1000000 done, 1000000 succeeded, 0 failed, 0 errored
status codes: 1000000 2xx, 0 3xx, 0 4xx, 0 5xx
traffic: 281000000 bytes total, 85000000 bytes http, 196000000 bytes data

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:    0.024 15.089 246.2  0.131 21041.707
Processing: 0.060 16.799  78.9 15.625 6848.592
Waiting:    0.060 16.799  78.9 15.625 6848.592
Total:      5.852 31.887 286.4 15.910 21042.083

Percentage of the requests served within a certain time (ms)
  50%  15.910
  66%  16.217
  75%  16.451
  80%  16.636
  90%  17.304
  95%  18.411
  98%  21.767
  99%  29.097
 100%  21042.083 (longest request)

[hvr]

fyi, the statistics are broken when using the -keepalive option

[jbenden]

FYI: When building under Ubuntu 16.04.2 LTS; I had to modify the build script to include the C math library, as during the link stage I experienced an undefined reference to symbol sqrt@@GLIBC_2.2.5.