Benchmark
7:27pm shiny:~/bm> http_load -parallel 5 -fetches 1000 bm1.txt
1000 fetches, 5 max parallel, 6e+06 bytes, in 58.1026 seconds
6000 mean bytes/connection
17.2109 fetches/sec, 103266 bytes/sec
msecs/connect: 0.403263 mean, 68.603 max, 0.194 min
msecs/first-response: 284.133 mean, 5410.13 max, 55.735 min
HTTP response codes:
  code 200 -- 1000
Let's ask Callgrind
valgrind --tool=callgrind --dump-instr=yes --trace-jump=yes -v /usr/sbin/apache -X
After
15000 fetches, 5 max parallel, 9e+07 bytes, in 13.6243 seconds
6000 mean bytes/connection
1100.97 fetches/sec, 6.60585e+06 bytes/sec
msecs/connect: 0.295239 mean, 17.802 max, 0.114 min
msecs/first-response: 3.61389 mean, 1097.1 max, 0.739 min
HTTP response codes:
  code 200 -- 15000