Github user osma commented on the issue:
https://github.com/apache/jena/pull/205
Thanks @afs for the approval. I will wait a few more days and then merge
this, unless there are objections.
The only scenario I'm mildly concerned about is if someone performs a
spatial query for a large area with a low limit parameter, so that the result
list gets cut off. Currently the top K results will (or at least should) be
from near the center of the area, but with the sorting disabled, the selection
of the top K results will become random.
I have to wonder why the sorting is so slow though. I don't know much about
spatial data processing, but I suppose that calculating the distances of ~2500
coordinates to a given center point, and then sorting the list of 2500 results
by those distances, shouldn't take 20 seconds. More like 20 milliseconds...
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