| From: | Michael Paquier <michael(at)paquier(dot)xyz> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Use pg_memory_is_all_zeros() in PageIsVerifiedExtended() |
| Date: | 2024-11-18 03:02:16 |
| Message-ID: | E1tCs1o-002L8o-A2@gemulon.postgresql.org |
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| Lists: | pgsql-committers |
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
--------------
src/backend/storage/page/bufpage.c | 13 +------------
1 file changed, 1 insertion(+), 12 deletions(-)
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