[GRASS-dev] Re: [GRASS-PSC] adding r.li to GRASS: speed

[Paolo Cavallini]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi all.
Some speed testing; on the same data set:
rows:       451
cols:       652
cells:      294052
moving window 10x10
Shannon analysis is almost 3 times faster:

r.li.shannon
real    7m41.768s
user    0m43.475s
sys     1m15.213s

r.le
real    21m47.613s
user    13m56.812s
sys     2m41.030s

AFAICU, IO (disk access) time is the limiting factor.

All the best.
pc
- --
Paolo Cavallini
email+jabber: cavallini at faunalia.it
www.faunalia.it
Piazza Garibaldi 5 - 56025 Pontedera (PI), Italy   Tel: (+39)348-3801953
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFFTQhV/NedwLUzIr4RAtSzAJ4tIg8tC9DWyox4XHkY2pl2w8K7wACfT7YF
yBk7mkbgk0RUH5LyNB7IZtA=
=Mv1g
-----END PGP SIGNATURE-----