On 06/02/14 22:12, Jeremy Harris wrote:
Did you try sorting already-sorted, reverse sorted, or pipe-organ shaped data sets?
Summary (low numbers better): Random ints: 83% compares, level on time. Sorted ints: level compares, 70% time. Reverse-sorted ints: 10% compares, 15% time (!) Constant ints: 200% compares, 360% time (ouch, and not O(n)) Pipe-organ ints: 80% compares, 107% time Random text: 83% compares, 106% time -- Cheers, Jeremy
siftdown_performance.ods
Description: application/vnd.oasis.opendocument.spreadsheet
-- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers