[postgis-devel] Issue 56 in postgis: ST_Buffer slow for large buffers, can be made faster

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Issue 56: ST_Buffer slow for large buffers, can be made faster
http://code.google.com/p/postgis/issues/detail?id=56

New issue report by pwramsey3:
What steps will reproduce the problem?
1. take a smallish geometry with somewhat dense vertices
2. buffer by a distance many times larger than the average inter-vertex  
distance
3. wait

A process that repeatedly buffers outwards, simplifying the output at each  
step, will return much
faster than a one-step process.  if your buffer distance is 1000 times your  
intervertex distance, try
doing buffer(1), simplify(1), buffer(10), simplify(10), buffer(100),  
simplify(100), etc.




Issue attributes:
	Status: Accepted
	Owner: pwramsey3
	Labels: Type-Enhancement Priority-Medium

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