[Qgis-developer] Loading features in bunch

[Martin Dobias]

Hi Paolo

This option was indeed superseded in 2.4 with introduction of
multi-threaded rendering by interval-based refresh rate. The
interval-based refresh is a better way of controlling refresh rate: it
has consistent behavior (few complex features do not block refresh),
it is not limited to just vector layers, and the number is easier to
understand/tweak. The old option did not really do any extra
performance tricks - simply increasing the number did fewer refreshes
(less extra work), so the overall rendering time shrunk. The default
of 250 ms for refresh is quite a conservative value already - so I do
not expect it would make a difference to make it higher (but lowering
it to something like 1 ms would make things slow).

Cheers
Martin


On Fri, Feb 5, 2016 at 3:39 PM, Paolo Cavallini <cavallini at faunalia.it> wrote:
> Hi all,
> I kind of remember an option to increase the number of features loaded
> before doing a redraw, that in some situations increased the general
> speed for layers with lots of features. Now in master I cannot see it
> back (just the interval for refresh): was I dreaming, or was it removed
> sometimes? In case, could someone remind me why?
> All the best, and thanks.
> --
> Paolo Cavallini - www.faunalia.eu
> QGIS & PostGIS courses: http://www.faunalia.eu/training.html
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