These two commands give the same output:
$ yes `echo {1..1000}` | head -c 2300M | md5sum
a0241f2247e9a37db60e7def3e4f7038 -
$ yes "`echo {1..1000}`" | head -c 2300M | md5sum
a0241f2247e9a37db60e7def3e4f7038 -
But the time to run is quite different:
$ time yes "`echo {1..1000}`" | head -c 2300M >/dev/null
real 0m0.897s
user 0m0.384s
sys 0m1.343s
$ time yes `echo {1..1000}` | head -c 2300M >/dev/null
real 0m11.352s
user 0m10.571s
sys 0m2.590s
WTF?!
I imagine 'yes' spends a lot of time collecting the 1000 args. But why
does it do that more than once?
/Ole
