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Subject: [ggl] Problems with the difference between two polygons
From: Barend Gehrels (barend)
Date: 2011-08-15 19:55:54

Hi Enrico,

On 14-8-2011 1:16, Enrico Leoni wrote:
> The test is updated and somewhat expanded.

Thanks for the update!

The results now correspond with what I myself measured earlier (more or
less, of course, I tested another library collection and did other tests).

> Sql Server System Types seems very good while Geos is not doing well.
> Maybe there are problems with my code but with big polygons its memory
> usage is very high (more than 3GB with 723347 input vertices). I also
> tried to load polygons from wkt files, bypassing the C++/Cli wrapper,
> but the memory usage is the same.

I didn't test Geos' memory usage, but w.r.t. speed, my tests also
indicated it is less performant.

Regards, Barend

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