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

[Michael Barton]

Here are some Mac tests, below...

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

> Date: Sun, 8 Feb 2009 20:24:21 +0100
> From: Markus Neteler <neteler at osgeo.org>
> Subject: Re: [GRASS-dev] r.surf.contour inefficiency?
> To: Glynn Clements <glynn at gclements.plus.com>
> Cc: grass-dev <grass-dev at lists.osgeo.org>
> Message-ID:
> 	<86782b610902081124y52abb470n258ee1a8ce455abe at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On Sun, Feb 8, 2009 at 5:25 PM, Glynn Clements <glynn at 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