[QGIS-Developer] QGIS startup time, Loading of Processing

[Andreas Neumann]

Hi Nyall, 

You are right. GRASS and SAGA take the longest time in initialization.
Perhaps we should disable those by default. I think both are for
advanced users. These users should know how to enable the SAGA and GRASS
providers, should they need them. 

Here is the screenshot from my QGIS on Linux (without SAGA) (I'll send
another one for Windows later): 

Seems like DataPlotly also takes substantial time to load. 

Greetings, 

Andreas 

On 2020-06-10 11:27, Nyall Dawson wrote:

> On Wed, 10 Jun 2020 at 19:22, Andreas Neumann <a.neumann at carto.net> wrote: 
> 
>> Hi,
>> 
>> Given that the initialization of the Processing plugin takes around 2/3 of the QGIS startup time, I wonder if we can discuss how to improve the situation?
>> 
>> Can there be a "delayed" or "on demand" loading of processing if the user needs it?
>> 
>> Quite a lot of users use QGIS for viewing or editing, without any need for analysis. I know that they could disable the processing plugin or use a different user profile where the plugin is disabled, but ...
>> 
>> Is there something that we could do as QGIS developers to speed up, delay or on-demand load the processing plugin?
> 
> Yes, I think there's lots we could do. But I'd love to see a
> screenshot of the new startup time profiler for one of your affected
> slow-to-start machines.
> 
> Typically the culprit is the GRASS and SAGA providers, where they load
> algorithms from 100s of text files. File access like this on Windows
> is very slow, so I think the easiest thing to try first would be if we
> concatenate all the definitions into a single master text file...
> 
> Nyall
> 
>> Thanks for the discussion,
>> 
>> Andreas
>> 
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