Optimize sort and deduplication in ginExtractEntries()
Remove NULLs from the array first, and use qsort to deduplicate only
the non-NULL items. This simplifies the comparison function. Also
replace qsort_arg() with a templated version so that the comparison
function can be inlined. These changes make ginExtractEntries() a
little faster especially for simple datatypes like integers.
Author: David Geier <geidav.pg@gmail.com>
Discussion: https://www.postgresql.org/message-id/6d16b6bd-a1ff-4469-aefb-a1c8274e561a@iki.fi
Branch
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master
Details
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https://git.postgresql.org/pg/commitdiff/6f5ad00ab763f9e029ec591f7f650bd09c1e933f
Modified Files
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src/backend/access/gin/ginutil.c | 151 +++++++++++++++++----------------------
src/include/access/gin_private.h | 2 +-
2 files changed, 68 insertions(+), 85 deletions(-)
