[QGIS-Developer] Preview job and slow datasources

[Patrick Dunford]

So to put it another way this is the reason why Qgis wants to use a huge 
amount of memory (40 GB) when I have a lot of raster images loaded in 
the background.


On 16/11/17 18:56, Tim Sutton wrote:
> Hi
>
>> On 16 Nov 2017, at 04:35, Patrick Dunford <enzedrailmaps at gmail.com 
>> <mailto:enzedrailmaps at gmail.com>> wrote:
>>
>> What is this "preview job" function?
>>
>>
>
> Its application logic to prefetch / pre-render offscreen content in 
> anticipation of user panning the map.
>
> Regards
>
> Tim
>>
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> —
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>
> *Tim Sutton*
>
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