Thread: pgsql: Minor speed hacks in AllocSetReset: avoid clearing the freelist

pgsql: Minor speed hacks in AllocSetReset: avoid clearing the freelist

From

tgl@svr1.postgresql.org (Tom Lane)

Date:

14 May 2005, 20:29:16

Log Message:
-----------
Minor speed hacks in AllocSetReset: avoid clearing the freelist headers
when the blocks list is empty (there can surely be no freelist items if
the context contains no memory), and use MemSetAligned not MemSet to
clear the headers (we assume alignof(pointer) >= alignof(int32)).
Per discussion with Atsushi Ogawa.  He proposes some further hacking
that I'm not yet sold on, but these two changes are unconditional wins
since there is no case in which they make things slower.

Modified Files:
--------------
    pgsql/src/backend/utils/mmgr:
        aset.c (r1.59 -> r1.60)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mmgr/aset.c.diff?r1=1.59&r2=1.60)