text = 2gb random file
text2 = 2 gb random file

Term 1:
kormoc@kormoc ~ $ time cp text text3

Term 2:
time rm text2

output:
Term 1:
kormoc@kormoc ~ $ time cp text text3

real    1m16.932s
user    0m0.115s
sys     0m9.387s

Term 2:
kormoc@kormoc ~ $ time rm text2

real    0m15.362s
user    0m0.000s
sys     0m0.541s

Term 3:
kormoc@kormoc ~ $ time rm text3

real    0m4.362s
user    0m0.000s
sys     0m0.541s