Improve performance of SendRowDescriptionMessage. There's three categories of changes leading to better performance: - Splitting the per-attribute part of SendRowDescriptionMessage into a v2 and a v3 version allows avoiding branches for every attribute. - Preallocating the size of the buffer to be big enough for all attributes and then using pq_write* avoids unnecessary buffer size checks & resizing. - Reusing a persistently allocated StringInfo for all SendRowDescriptionMessage() invocations avoids repeated allocations & reallocations.
Author: Andres Freund Discussion: https://postgr.es/m/20170914063418.sckdzgjfrsbek...@alap3.anarazel.de Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/4c119fbcd49ba882791c7b99a1e934b985468e9f Modified Files -------------- src/backend/access/common/printtup.c | 146 ++++++++++++++++++++++++++--------- src/backend/tcop/postgres.c | 35 +++++++-- src/include/access/printtup.h | 4 +- 3 files changed, 138 insertions(+), 47 deletions(-) -- Sent via pgsql-committers mailing list (pgsql-committers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
