Thread: pgsql: Use pg_memory_is_all_zeros() in PageIsVerifiedExtended()

Use pg_memory_is_all_zeros() in PageIsVerifiedExtended()

Relying on pg_memory_is_all_zeros(), which would apply SIMD instructions
when dealing with an aligned page, is proving to be at least three times
faster than the original size_t-based comparisons when checking if a
BLCKSZ page is full of zeros.  Note that PageIsVerifiedExtended() is
called each time a page is read from disk, and making it faster is a
good thing.

Author: Bertrand Drouvot
Discussion: https://postgr.es/m/CAApHDvq7P-JgFhgtxUPqhavG-qSDVUhyWaEX9M8_MNorFEijZA@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/03a42c9652f8cc2c447840e39418b862c48fd41d

Modified Files
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src/backend/storage/page/bufpage.c | 13 +------------
1 file changed, 1 insertion(+), 12 deletions(-)