This may be useful when doing tests of a web site’s response time. You can add “time” before any command to measure the time it takes.

time wget http://www.aip.im -q --output-document=/dev/null

Results

real    0m0.349s
user    0m0.000s
sys     0m0.004s

The “real” value indicates the time it took to receive http://www.aip.im.