[postgis-devel] More Cascade Union Adventures

Obe, Regina robe.dnd at cityofboston.gov
Wed Aug 13 16:37:05 PDT 2008


Try this set.  - this has 2895 records
 
My timings are
---time 161,047 ms = SELECT 161047/1000.0/60 = 2.68 minutes
SELECT ST_CascadeUnion(the_geom)
from usstatebounds;

--time 121719 ms = SELECT 121719/1000.0/60 = 2.02 minutes
SELECT st_unitecascade_garray_sort(ARRAY(SELECT the_geom FROM usstatebounds));

In OJ - it gets to the last round and then fails with a Java out of Heap space error.




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