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

[PostGIS]

#3864: Sorting by geometry is slower than sorting by geohash
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  Reporter:  komzpa   |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 2.4.1
 Component:  postgis  |    Version:  2.3.x
Resolution:           |   Keywords:
----------------------+---------------------------

Comment (by komzpa):

 {{{
 [local] gis at gis=# create table juno_osm_point_unclustered as (select *
 [more] ( >  from juno_osm_point ORDER BY osm_id);
 SELECT 159843185
 Time: 768781,686 ms (12:48,782)
 [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 159843185
 Time: 1223812,285 ms (20:23,812)
 [local] gis at gis=# create table juno_osm_point_pt2 as (select * from
 juno_osm_point_unclustered ORDER BY way);
 ERROR:  57014: canceling statement due to user request
 LOCATION:  ProcessInterrupts, postgres.c:2999
 Time: 932325,460 ms (15:32,325)
 -- here postgres ate 140GB of my 128 GB machine so I cancelled it.


 [local] gis at gis=# create table juno_osm_point_pt3 as (select * from
 juno_osm_point_unclustered ORDER BY way::bytea);
 SELECT 159843185
 Time: 1055460,975 ms (17:35,461)
 -- this can be used as reasonable performance estimator
 }}}

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3864#comment:9>
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