pgsql/src/backend/utils/adt regexp.c

CVSROOT:    /cvsroot
Module name:    pgsql
Changes by:    thomas@postgresql.org    02/06/14 22:49:47

Modified files:
    src/backend/utils/adt: regexp.c

Log message:
    Search the existing regular expression cache as a ring buffer.
    Will optimize the case for repeated calls for the same expression,
    which seems to be the most common case. Formerly, always searched
    from the first entry.
    May want to look at the least-recently-used algorithm to make sure it
    is identifying the right slots to reclaim. Seems silly to do math when
    it seems that we could simply use an incrementing counter...