[josm-dev] JOSM Mappaint - major improvements

[Ulf Lamping]

Hi!

After a week of intensive work, I was able to *significantly* improve 
the performance of JOSM mappaint (the standard way JOSM paints the OSM 
data).

With the JOSM version of monday, I saw an improvement in my current 
tests (machine: WinXp, Core Duo, 1.8GHz) from ~600ms to around ~150ms 
for each and every repaint of the map.

This in effect means the difference between annoying or very fluent work.


All in all, this was an improvement worth noting!


I would be interested in reports if this noticably improved the 
performance on your machine as well (or not).

BTW: On Unix try optimizations: http://wiki.openstreetmap.org/wiki/JOSM

Regards, ULFL

P.S: This breaks Dirks current development work on showing 
multipolygons, this is expected to be fixed in the next days ...