Add more efficient functions to pqformat API. There's three prongs to achieve greater efficiency here:
1) Allow reusing a stringbuffer across pq_beginmessage/endmessage, with the new pq_beginmessage_reuse/endmessage_reuse. This can be beneficial both because it avoids allocating the initial buffer, and because it's more likely to already have an correctly sized buffer. 2) Replacing pq_sendint() with pq_sendint$width() inline functions. Previously unnecessary and unpredictable branches in pq_sendint() were needed. Additionally the replacement functions are implemented more efficiently. pq_sendint is now deprecated, a separate commit will convert all in-tree callers. 3) Add pq_writeint$width(), pq_writestring(). These rely on sufficient space in the StringInfo's buffer, avoiding individual space checks & potential individual resizing. To allow this to be used for strings, expose mbutil.c's MAX_CONVERSION_GROWTH. Followup commits will make use of these facilities. Author: Andres Freund Discussion: https://postgr.es/m/20170914063418.sckdzgjfrsbek...@alap3.anarazel.de Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/1de09ad8eb1fa673ee7899d6dfbb2b49ba204818 Modified Files -------------- src/backend/libpq/pqformat.c | 88 ++++++++------------- src/backend/utils/mb/mbutils.c | 11 --- src/include/libpq/pqformat.h | 168 ++++++++++++++++++++++++++++++++++++++++- src/include/mb/pg_wchar.h | 11 +++ 4 files changed, 208 insertions(+), 70 deletions(-) -- Sent via pgsql-committers mailing list (pgsql-committers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
