Bug report #6756
heatmap plugin is very slow
|Affected QGIS version:||1.8.0||Regression?:||No|
|Operating System:||Windows 7 x64||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:|
|Crashes QGIS or corrupts data:||Yes||Copied to github as #:||15912|
Coming from #6691, the heatmap plugin is very slow. Running it on a layer with over 700,000 points crashed after 12 hours.
GRASS GIS recently improved its v.kernel for the exact same layer. That took 16 hours, and with recent improvements, it reduced the execution time to about 2.5% of the original time. Just mentioning this in case there are lessons that could be learned from GRASS.