[dev] Performance regression: fiona.transform much slower since GDAL 3


Sean Gillies
 

Hi Stefan,

I'm cross-posting this over to main@fiona.groups.io. The dev list is for project planning and design discussions.

Is it possible you are running into the issue with older sqlite described in https://github.com/OSGeo/PROJ/issues/1718?

On Fri, Oct 9, 2020 at 4:53 AM <stefan.brand@...> wrote:
Hello everyone,


I kindly request your comments/answers to this gis.SE question, where I
have detailed my issue: https://gis.stackexchange.com/q/376211/122597

If you do not have an account there, but still know an answer, please
contact me directly via e-mail.

Thank you for your attention!


Best, Stefan









--
Sean Gillies


stefan.brand@...
 

Hi Sean,

thanks for putting my mail in the right place!

The sqlite version should not be a problem as we have sqlite 3.33
installed.

It seems that the performance issue indeed was with initializing the
transformer over and over again. I get much better results with
pyproj: https://gis.stackexchange.com/a/376247/122597

I will test this fix in our real-life code and get back to you if I run
into troubles.

Thank you!
Best, Stefan

On Fri, 2020-10-09 at 12:24 -0600, Sean Gillies wrote:
Hi Stefan,

I'm cross-posting this over to main@fiona.groups.io. The dev list is
for project planning and design discussions.

Is it possible you are running into the issue with older sqlite
described in https://github.com/OSGeo/PROJ/issues/1718?

On Fri, Oct 9, 2020 at 4:53 AM <stefan.brand@eox.at> wrote:
Hello everyone,


I kindly request your comments/answers to this gis.SE question,
where I
have detailed my issue:
https://gis.stackexchange.com/q/376211/122597

If you do not have an account there, but still know an answer,
please
contact me directly via e-mail.

Thank you for your attention!


Best, Stefan