[Qgis-psc] Fixing a performance regression in rule based renderer with many rules

[Neumann, Andreas]

Hi Anita, 

Unfortunately, I learned too late about this issue, to include it in the
2.18 bug fixing round. But it is a very important issue for quite a few
users who use the rule-based symbology. A member of the German QGIS user
group told me that he can't use QGIS >2.8 because of this issue. They
extensively use rule based symbology in utility documentation (gaz,
water, electricity, waste-water, etc.) and these layers use complex
symbology, based on many attribute/map scale range combinations. They
often have 50-150 rules per layer. I guess the same is true for
sophisticated OSM or topographic map rules. 

I would do the next round of QGIS grants somewhere around Q2 2017 -
after the results of the first round of grants are visible and we have
again more money in our account. With the currently available funds we
can't do the QGIS grants too often (maybe 1-2 times per year), if we
also do the bug fixing efforts (which are more important in my opinion
than the grants). 

So this fix is neither in 2.18 bug fixing nor in the grants. It is an
extra expense in between, for approx. 1.5k EUR. 

Andreas 

On 2016-10-21 13:37, Anita Graser wrote:

> On Fri, Oct 21, 2016 at 11:18 AM, Neumann, Andreas <a.neumann at carto.net> wrote: 
> 
>> I am asking PSC for approval that we can pay him the two dev days from the QGIS.ORG [1] funds to work on this issue. Fixes would go into 3x and the various relevant 2x versions that still get updates. 
>> 
>> Can you please provide feedback if you would agree with this proposal or not?
> 
> ​I'm all for getting issues like this fixed. 
> 
> At the same time, I'm wondering how this fits into our existing bugfixing and grants plan. Would this be considered as part of the next bug fixing round? Or would this fall under grants? We just finished the first grants round but I assume we could announce the planned date for the next round. 
> 
> Best wishes, 
> Anita​

  

Links:
------
[1] http://QGIS.ORG
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