➜  cp-tests  ./test.sh
source directory size
300M    /Users/kracekumarramaraju/code
cp.py - Python without gevent

real    1m23.354s
user    0m1.818s
sys     0m5.032s
302M    /Volumes/My Passport/test/1
cp-gevent.py - Python with gevent

real    1m24.212s
user    0m1.772s
sys     0m4.748s
302M    /Volumes/My Passport/test/2
alias cp='rsync --progress -ah' - Rsync

real    1m21.145s
user    0m0.230s
sys     0m5.172s
302M    /Volumes/My Passport/test/3
Plain cp command

real    1m24.065s
user    0m0.232s
sys     0m5.174s
302M    /Volumes/My Passport/test/4
cp.go - cp in Go lang
2013/06/23 21:04:38 Files copied.
cp.go completed

real    1m27.786s
user    0m1.106s
sys     0m3.369s
302M    /Volumes/My Passport/test/5
cp.lua - cp in lua

real    1m19.340s
user    0m1.905s
sys     0m3.893s
302M    /Volumes/My Passport/test/6