good point from bkutil about unix_utils's sha256 example...

foo.txt

On Thu, Mar 1, 2012, at 02:49 PM, Balazs Kutil wrote:

>I'd have one question though. Is there some specific reason behind not using
>    $ Digest::SHA256.file("big.file").hexdigest
>in the SHA example in readme / in the code? It seems to do exactly the same as the second code snippet, while keeping the memory footprint low...



hi Balazs,

Good point - I should choose a better example.

I checked and at least the speed of UnixUtils is about the same...

alzabo0:~/Documents/TomTom/HOME/Download/complete/map/USA__Canada___Mexico
$ du -sh USA_Canada_and_Mexico_P.zip 
1.5G  USA_Canada_and_Mexico_P.zip
alzabo0:~/Documents/TomTom/HOME/Download/complete/map/USA__Canada___Mexico
$ time ruby -r'unix_utils' -e 'p
UnixUtils.shasum("USA_Canada_and_Mexico_P.zip", 256)'
"3c72f24f258c762b2f7061debadb9a6e997bd5353c99966cb095d865a4ea2b89"

real  0m12.621s
user  0m11.927s
sys 0m0.692s
alzabo0:~/Documents/TomTom/HOME/Download/complete/map/USA__Canada___Mexico
$ time ruby -r'digest' -e 'p
Digest::SHA256.file("USA_Canada_and_Mexico_P.zip").hexdigest'
"3c72f24f258c762b2f7061debadb9a6e997bd5353c99966cb095d865a4ea2b89"

real  0m13.780s
user  0m13.435s
sys 0m0.344s

Best,
Seamus