[jira] [Updated] (LUCENE-7242) LatLonTree should build a balanced tree

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-7242?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-7242:
--------------------------------
    Attachment: LUCENE-7242.patch

Initial patch: seems to make things a bit faster:

Synthetic polygons from luceneUtil
||vertices||old QPS||new QPS|
|5|38.4|41.1|
|50|29.7|33.1|
|500|27.5|30.5|
|5000|18.8|20.1|
Real polygons (33 london districts: http://data.london.gov.uk/2011-boundary-files)
||vertices||old QPS||new QPS|
|avg 5.6k|73.0|84.7|

I want to check that startup cost is not hurt, otherwise I think its better. startup cost may be improved.

> LatLonTree should build a balanced tree
> ---------------------------------------
>
>                 Key: LUCENE-7242
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7242
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Robert Muir
>         Attachments: LUCENE-7242.patch
>
>
> [~rjernst]'s idea: we create an interval tree of edges, but with randomized order.
> Instead we can speed things up more by creating a balanced tree up front.



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