[geos-devel] [GEOS] #343: After applying a buffer over a multiline the library starts growing in memory usage and hungs

[Martin Davis]

Ok, I tried the roads_broken geometry in JTS using the buffer-and-union 
approach.  The result matches the one you posted, strk.

Time was 2.7 s.  So the two systems are pretty close.

It would be interesting if you tried the other geometry as well.

Martin Davis wrote:
> Ah, ok.  I was using this one.
>
> http://trac.osgeo.org/geos/attachment/ticket/344/fail_geom.txt.gz
>
> I'll try the other one and see what kind of performance I get.
>
>
>
> strk wrote:
>> On Fri, May 14, 2010 at 09:11:30AM -0700, Martin Davis wrote:
>>  
>>> I'm surprise that PostGIS is so much faster too!  Can you supply the 
>>> output, so I can check it against JTS?
>>>
>>> One thing I notice is that the input I'm using has 5615 elements and 
>>> 11502 points.
>>>     
>>
>> The input I'm using is this:
>> http://trac.osgeo.org/geos/attachment/ticket/344/roads_broken_geom.txt.gz 
>>
>>
>> The output I have with it is attached.
>>
>> --strk;
>>
>>   ()   Free GIS & Flash consultant/developer
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-- 
Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022