[Qgis-psc] Performance regressions (was QGIS 2.18 bug fixing effort)

[Giovanni Manghi]

> Hi Giovanni,
>
> I'm struggling to reproduce these rendering regressions. I've tested
> building snapshots from 2.14.0 through to 2.18.8 and for my tests the
> rendering performance has remained relatively constant throughout this
> time.
>
> This is using both a 3 million point shapefile and a 3 million polygon
> shapefile. Ubuntu 16.04, 64 bit, Release mode build using gcc.
>
> Could there be something else which is involved? Are you reprojecting
> the layers? Using labeling? Some other non-default styling?



Hi Nyall,


here my new tests


https://drive.google.com/file/d/0B8VD1V_leaeWNmpaOFNxZGxicVU/view?usp=sharing


I already shared with you my test dataset. If others want it I can
share privately too.


cheers

-- G --