[postgis-devel] Introducing wagyu to validate MVT polygons

[Darafei "Komяpa" Praliaskouski]

Hi,

Looking at the graphs I can't grok meaningfulness of mean 99% CI on graph
page 13 - it feels like mean is in the saddle of camel-shaped distribution.
Why are there two distinct peaks?

Otherwise I like how you fixed up wagyu. Can the changes be upstreamed so
that pulling new version is a matter of file copy later?.

On Mon, Jan 14, 2019 at 1:39 PM Raúl Marín Rodríguez <rmrodriguez at carto.com>
wrote:

> Hi,
>
> Since the PR has grown quite a bit and includes several fixes to the
> current
> implementation and new tests, I'm going to start pushing all the things
> that
> aren't directly related to wagyu (and backporting when necessary) to
> cleanup
> the PR as much as possible.
>
> If anyone is interested in this change you can see the performance
> difference
> in [1]. Depending on the size of the polygon after the simplification
> process
> it can be up to 27x faster. After some improvements, I don't see any case
> where wagyu is slower and the only caveat is that it might drop very small
> polygons.
>
> Also since I've only tested this in Linux, other OS might require some
> extra
> tweaking of the build scripts, so if you'd like to help please try to build
> and run it (passing the `--with-wagyu` flag to configure)
>
> [1] -
> https://github.com/postgis/postgis/files/2754774/20190111_geos_vs_20190111_wagyu.pdf
>
> Regards
>
> --
> Raúl Marín Rodríguez
> carto.com
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-- 
Darafei Praliaskouski
Support me: http://patreon.com/komzpa
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