[GRASS-dev] buffer horribly slow?

[Helmut Kudrnovsky]

hi paolo,

>Hi all.
>v.buffer input=fiumi at paolo type=line layer=1 distance=5000 output=fiumi_buf
>takes *ages* to process. You can find the location, with only the vector fiumi at:
>http://int.faunalia.it/~paolo/sample.tar.gz . Tested on debian testing (6.4.0~rc5-3).
>All the best.

tested on self compiled Grass64svn (rev39464) on WinVista

(Mon Oct 12 19:54:10 2009)                                                      
v.buffer input=fiumi at paolo output=fiumi_buf type=line distance=5000             
Buffering lines...
Building topology for vector map <fiumi_buf>...
Registering primitives...
227 primitives registered
25752 vertices registered
Number of nodes: 227
Number of primitives: 227
Number of points: 0
Number of lines: 0
Number of boundaries: 227
Number of centroids: 0
Number of areas: -
Number of isles: -
Snapping boundaries...
Breaking boundaries...
Removing duplicates...
Attaching islands...
Building topology for vector map <fiumi_buf>...
Building areas...
4353 areas built
4 isles built
Attaching islands...
Number of nodes: 4948
Number of primitives: 14022
Number of points: 0
Number of lines: 0
Number of boundaries: 14022
Number of centroids: 0
Number of areas: 4353
Number of isles: 4
Number of areas without centroid: 4353
Attaching centroids...
Building topology for vector map <fiumi_buf>...
Attaching centroids...
Number of nodes: 5529
Number of primitives: 14603
Number of points: 0
Number of lines: 0
Number of boundaries: 14022
Number of centroids: 581
Number of areas: 5304
Number of isles: 25
Number of areas without centroid: 32
Building topology for vector map <fiumi_buf>...
Registering primitives...
   20002400 primitives registered
12029 vertices registered
Building areas...
613 areas built
24 isles built
Attaching islands...
Attaching centroids...
Number of nodes: 1811
Number of primitives: 2400
Number of points: 0
Number of lines: 0
Number of boundaries: 1819
Number of centroids: 581
Number of areas: 613
Number of isles: 24
Number of areas without centroid: 32
(Mon Oct 12 19:54:33 2009) Command finished (23 sec)

so finished after 23 seconds, not so bad?

best regards
helmut



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