[sqlite] Massive performance regression in 3.7.x

[Charles Samuels]

Greetings,

With the sqlite database here: 
http://www.derkarl.org/~charles/massive_performance_regression.bz2

There is a massive performance regression between 3.7.1 and 3.7.2, when 
compared to 3.6.23.1.

The following query runs orders of magnitude slower than it did in the 
previous version:


select *
            from object_formats join 
            page_table on page_table.version=3 and page_table.objectid = 
object_formats.objectid ;

Thanks,

Charles
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