Opened 12 years ago
Last modified 12 years ago
#1810 closed enhancement
ST_MakeValid: slow with thousand elements multipolygons [Fixed by GEOS-3.3.4] — at Version 3
| Reported by: | strk | Owned by: | pramsey |
|---|---|---|---|
| Priority: | medium | Milestone: | PostGIS GEOS |
| Component: | postgis | Version: | 2.0.x |
| Keywords: | Cc: |
Description (last modified by )
Following #1806 there's another case of big slowdown being multipolygons containing thousands of elements.
Not sure I'll have the time to enhance this for 2.0.1
Let's leave it open until GEOS-3.3.4 is out
Change History (3)
comment:1 by , 12 years ago
comment:2 by , 12 years ago
| Milestone: | PostGIS 2.0.1 → PostGIS GEOS |
|---|
Fixed GEOSPolygonize enhancement ticket here: http://trac.osgeo.org/geos/ticket/545
comment:3 by , 12 years ago
| Description: | modified (diff) |
|---|---|
| Summary: | ST_MakeValid: slow with thousand elements multipolygons → ST_MakeValid: slow with thousand elements multipolygons [Fixed by GEOS-3.3.4] |
With GEOS revisions referenced in http://trac.osgeo.org/geos/ticket/545#comment:3 this MakeValid call takes 30 seconds, with new slowest component being GEOSDifference (same as with #1806).
Before that commit, MakeValid took 56 seconds.
Note:
See TracTickets
for help on using tickets.
This time the slowest operation seems to be GEOSPolygonize