As mentioned in some previous mail, I have finished rendering optimisation,
which gives best results for zoomed in drawings with complex (multi-node)
paths. Optimisation focus - eliminating cubicTo and LineTo nodes outside
of visible area, so no unneeded calculations is needed and less memory is
consumed (this avoids crashes which were occurring previously if zooming
into a complex drawing). This can be improved even more (for example ArcTo
nodes are not affected and is still slow if zoomed in; etc).
This might affect all the rendering, so please report any broken rendering