[postgis-tickets] [PostGIS] #3864: Sorting by geometry is slower than sorting by geohash

[PostGIS]

#3864: Sorting by geometry is slower than sorting by geohash
---------------------+---------------------------
 Reporter:  komzpa   |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  medium   |  Milestone:  PostGIS 2.4.0
Component:  postgis  |    Version:  2.3.x
 Keywords:           |
---------------------+---------------------------
 ```
 [local] gis at gis=# create table juno_osm_point_unclustered as (select *
 from juno_osm_point ORDER BY osm_id);
 SELECT 159446335
 Time: 601714,217 ms (10:01,714)

 [local] gis at gis=# create table juno_osm_point_pt1 as (select * from
 juno_osm_point_unclustered ORDER BY
 ST_GeoHash(ST_Transform(ST_Envelope(way),4326),10) COLLATE "C");
 SELECT 159446335
 Time: 1248105,490 ms (20:48,105)
 [local] gis at gis=# create table juno_osm_point_pt2 as (select * from
 juno_osm_point_unclustered ORDER BY way);
 SELECT 159446335
 Time: 1287415,365 ms (21:27,415)
 ```

 This may happen as there are some other infrastructure optimizations in
 string sorting code, like abbreviated key comparsions.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3864>
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