On Tue, 28 Jun 2022 at 23:30, David Marteau via QGIS-Developer
wrote:
>
> Hi,
>
> From bisect-like analysis, I have found the commit that introduces the loss
> of loading performance:
>
> https://github.com/qgis/QGIS/commit/c6beb62216fcfbfe3ca64283c09117da53800a98
>
> We need more investigation
Hi,
From bisect-like analysis, I have found the commit that introduces the
loss of loading performance:
https://github.com/qgis/QGIS/commit/c6beb62216fcfbfe3ca64283c09117da53800a98
We need more investigation to understand exactly what is causing that
regression.
David Marteau
www.3liz.com
I Wonder why we have `Creating auxiliary storage` that takes 65.0 ms in
Qgis 3.26 and it does not appears in Qgis 3.24:
I need to figure how auxiliary layers are loaded in Qgis 3.24 (are they
loaded lazily ?).
I happends that loading auxiliary layer is negligible in 3.24 :
>> projectload,
Hi,
Here is a first analysis using QgsRuntimeProfiler outputs
The project is the same in all tests and has been saved with Qgis 3.26.
This is a first load in each case just after qgis init, so there should
be no caching involved.
Output has been filtered to `projectload` profiler group and
May be I could use QgsRuntimeProfiler output in first place ?
Le 20/06/2022 à 18:55, Even Rouault a écrit :
Use sysprof or just run under a debugger and interrupt regularly
should help you spot in which method(s) most time is spent
Le 20/06/2022 à 18:48, David Marteau via QGIS-Developer a
Use sysprof or just run under a debugger and interrupt regularly should
help you spot in which method(s) most time is spent
Le 20/06/2022 à 18:48, David Marteau via QGIS-Developer a écrit :
I used the following test:
readflags = Qgis.ProjectReadFlags() readflags |=
On Tue, 21 June 2022, 2:48 am David Marteau, wrote:
> I used the following test:
>
> readflags = Qgis.ProjectReadFlags()readflags |=
> Qgis.ProjectReadFlag.TrustLayerMetadata|Qgis.ProjectReadFlag.DontLoad3DViews|Qgis.ProjectReadFlag.DontLoadProjectStyles
> prj = QgsProject()
> %timeit -n 1
I used the following test:
readflags = Qgis.ProjectReadFlags() readflags |=
Qgis.ProjectReadFlag.TrustLayerMetadata|Qgis.ProjectReadFlag.DontLoad3DViews|Qgis.ProjectReadFlag.DontLoadProjectStyles
prj = QgsProject()%timeit -n 1
prj.read(f"{datapath}/france_parts3_26.qgs",readflags)
105 ms ±
Hi,
> You should set the other new read optimisation flags here -- see
https://github.com/qgis/QGIS/blob/88ebb3f2f513dbce5a775f50e51ea0117f859c65/src/core/qgis.h#L1962
These are already available also in 3.24 and we use the
`TrustLayerMetadata` in the above test. For server, the other
On Mon, 20 June 2022, 9:37 pm David Marteau via QGIS-Developer, <
qgis-developer@lists.osgeo.org> wrote:
> Hi,
>
> I have noticed a huge drop of performance while testing Qgis server with
> Qgis 3.26, from 10x to 30x slower as usual.
>
> Trying to reduce the problem I have found a huge increase
Hi,
I have noticed a huge drop of performance while testing Qgis server with
Qgis 3.26, from 10x to 30x slower as usual.
Trying to reduce the problem I have found a huge increase of time spend
reading the project in 3.26 compared to 3.24.
Here some benchmark with very simple project from
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