On 2014-09-12 22:38:01 +0300, Heikki Linnakangas wrote: > It's worth noting that there are faster CRC implementations out there than > what we use. The Slicing-by-4 algorithm was discussed years ago, but was not > deemed worth it back then IIRC because we typically calculate CRC over very > small chunks of data, and the benefit of Slicing-by-4 and many other > algorithms only show up when you work on larger chunks. But a full-page > image is probably large enough to benefit.
I've recently pondered moving things around so the CRC sum can be computed over the whole data instead of the individual chain elements. I think, regardless of the checksum algorithm and implementation we end up with, that might end up as a noticeable benefit. Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers