Hi all,
in general I think we should advice to use the layer.addFeature() method
with a layer.commitChanges() in the end. It has the advantage that it
does batch updates on the provider automatically and proper signals are
sent so the UI (canvas, attribute table...) can reflect changes immediately
Hi Denis,
Adding all features at once, or 1000 by 1000, speeds up enormously. It
only takes a few minutes, at a steady speed of 480 fpm. Where adding the
same dataset 1 by 1 took about 5 hours.
Thanks for pointing this out!
Raymond
On 30-07-15 09:34, Denis Rouzaud wrote:
From your code [0
Merci Denis,
I will try both options later today.
Raymond
On 30-07-15 09:34, Denis Rouzaud wrote:
From your code [0] , I would see 2 options:
* add features all at once on the provider using
QgsVectorDataProvider::addFeatures (the method you currently use)
* work on the layer level rather
From your code [0] , I would see 2 options:
* add features all at once on the provider using
QgsVectorDataProvider::addFeatures (the method you currently use)
* work on the layer level rather than the provider, which I believe is
the recommended way for plugins. Make the layer editable, and a
Hi Hugo,
I'm not specifically adding an index. So if you are right, I'm not using
that.
Regards,
Raymond
On 30-07-15 09:10, Hugo Mercier wrote:
Hi Raymond,
On 29/07/2015 09:04, Raymond Nijssen wrote:
Dear developers, ;)
A plugin of mine imports data from a gml file into a memory layer. W
Hi Denis,
The code is in the ImaerReader plugin in the qgis repo and in github:
https://github.com/opengeogroep/AERIUS-QGIS-plugins
I'm adding the features one by one.
Regards,
Raymond
On 30-07-15 08:46, Denis Rouzaud wrote:
Hi Raymond,
Can you show us the code doing this?
Do you commit fea
Hi Raymond,
On 29/07/2015 09:04, Raymond Nijssen wrote:
> Dear developers, ;)
>
> A plugin of mine imports data from a gml file into a memory layer. Works
> fine for tiny gml files, but takes forever on huge ones. Sounds
> plausible maybe, but the relation is not linear.
>
> So I did did some te
Hi Raymond,
Can you show us the code doing this?
Do you commit features one by one ar all at once?
Best wishes,
Denis
On 07/29/2015 09:04 AM, Raymond Nijssen wrote:
Dear developers, ;)
A plugin of mine imports data from a gml file into a memory layer.
Works fine for tiny gml files, but takes
No idea why that might be happeningbut hats off to you for such a
well documented report.
I had to say it :-)
2015-07-29 9:04 GMT+02:00 Raymond Nijssen :
> Dear developers, ;)
>
> A plugin of mine imports data from a gml file into a memory layer. Works
> fine for tiny gml files, but takes f
Dear developers, ;)
A plugin of mine imports data from a gml file into a memory layer. Works
fine for tiny gml files, but takes forever on huge ones. Sounds
plausible maybe, but the relation is not linear.
So I did did some tests and found out that reading and parsing the gml
and creating th
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