Jeremy Kerr <j...@ozlabs.org> writes: > Rather than testing single bits in a loop, change AllocSetFreeIndex to > use the __builtin_clz() function to calculate the chunk index.
Per subsequent discussion and testing, I've committed a patch that uses a lookup table instead of depending on __builtin_clz(). http://archives.postgresql.org/message-id/20090721195312.207ca753...@cvs.postgresql.org regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
