[GRASS-dev] r.surf.contour inefficiency?

GRASS GRASS developer
1

Here are some Mac tests, below...

On Feb 8, 2009, at 12:45 PM, <grass-dev-request@lists.osgeo.org> wrote:

Date: Sun, 8 Feb 2009 20:24:21 +0100
From: Markus Neteler <neteler@osgeo.org>
Subject: Re: [GRASS-dev] r.surf.contour inefficiency?
To: Glynn Clements <glynn@gclements.plus.com>
Cc: grass-dev <grass-dev@lists.osgeo.org>
Message-ID:
  <86782b610902081124y52abb470n258ee1a8ce455abe@mail.gmail.com>
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On Sun, Feb 8, 2009 at 5:25 PM, Glynn Clements <glynn@gclements.plus.com> wrote:

Markus Neteler wrote:

I'll remove the segmentation code in 7.0.

Here the timing comparison:

# NC data set
g.region vect=elev_lid792_cont1m res=1 -p
v.to.rast elev_lid792_cont1m out=elev_lid792_cont1m use=z
time r.surf.contour elev_lid792_cont1m out=dem

Results:
* GRASS 6.5.svn (pre seg size update):
147.66user
24.14system
2:52.22elapsed
184inputs+4544outputs (1major+508minor) pagefaults 0swaps

GRASS 6.5.svn (nc_spm_07):~ > time r.surf.contour elev_lid792_cont1m out=dem --overwrite
  100%

real 3m43.817s
user 2m0.088s
sys 1m42.810s

* GRASS 6.5.svn (post seg size update):
118.28user
0.26system
1:58.93elapsed
0inputs+4984outputs (0major+1202minor)pagefaults 0swaps

GRASS 6.5.svn (nc_spm_07):~ > time r.surf.contour elev_lid792_cont1m out=dem
  100%

real 1m6.448s
user 1m5.809s
sys 0m0.242s

* GRASS 7.svn:
72.19user
0.04system
1:12.38elapsed
0inputs+320outputs (0major+1023minor) pagefaults 0swaps

GRASS 7.0.svn (nc_spm_07):~ > time r.surf.contour elev_lid792_cont1m out=dem --overwrite
  100%

real 0m43.900s
user 0m43.574s
sys 0m0.148s

Michael