On Tue, Mar 10, 2015 at 1:31 AM, Giuseppe Scrivano <[email protected]> wrote:
> $ time src/yes `echo {1..2000}` | head -c 2000M | md5sum
> 55c293324aa6ecce14f0bf30da5a4686 -
>
> real 0m7.994s
> user 0m11.093s
> sys 0m2.953s
>
> versus (with the patch):
>
> $ time src/yes `echo {1..2000}` | head -c 2000M | md5sum
> 55c293324aa6ecce14f0bf30da5a4686 -
>
> real 0m3.534s
> user 0m4.164s
> sys 0m1.803s
Are you sure your are not limited by md5sum?
$ time yes "`echo {1..2000}`" | head -c 2000M >/dev/null
real 0m0.660s
user 0m0.180s
sys 0m1.115s
The solution should perform no worse than that.
/Ole
