ntimesとpercentileでperformance test
code:shell
ntimes 100 -p 4 -- curl -s -o /dev/null -w '%{time_starttransfer}\n' "$@" 'http://example.com' --compressed | percentile 50%: 2.119364
66%: 2.178444
75%: 2.215702
80%: 2.234143
90%: 2.294236
95%: 2.373337
98%: 10.459605
99%: 10.468586
100%: 10.472436