cb7b2e5e8e
Over the past few releases, we've added a huge amount of complexity to our popcount implementations. Commits fbe327e5b4, 79e232ca01, 8c6653516c, and 25dc485074 did some preliminary refactoring, but many opportunities remain. In particular, if we disclaim interest in micro-optimizing this code for 32-bit builds and in unnecessary alignment checks on x86-64, we can remove a decent chunk of code. I cannot find public discussion or benchmarks for the code this commit removes, but it seems unlikely that this change will noticeably impact performance on affected systems. Suggested-by: John Naylor <johncnaylorls@gmail.com> Reviewed-by: John Naylor <johncnaylorls@gmail.com> Discussion: https://postgr.es/m/CANWCAZY7R%2Biy%2Br9YM_sySNydHzNqUirx1xk0tB3ej5HO62GdgQ%40mail.gmail.com
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.