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fusionpbx/app/xml_cdr
emaktech c97d9e7022 Order by start_epoch to Speed Up Query Execution
In some cases, this seems to speed up xml_cdr loading times by ~10x.

It appears one big cause of this is the final ORDER_BY statements are very slow in PostgreSQL for timestamp fields. Ordering by start_epoch field improves query execution time in a dramatic way and should result in the same ordering.
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