git.postgresql.org Git - postgresql.git/commit
2024年11月18日 02:44:11 +0000 (11:44 +0900)
2024年11月18日 02:52:35 +0000 (11:52 +0900)
commit 03a42c9652f8cc2c447840e39418b862c48fd41d
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
This is the main PostgreSQL git repository.
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