c4e44224cf
Commit ca481d3c9a introduced mul_var_short(), which is used by mul_var() whenever the shorter input has 1-4 NBASE digits and the exact product is requested. As speculated on in that commit, it can be extended to work for more digits in the shorter input. This commit extends it up to 6 NBASE digits (up to 24 decimal digits), for which it also gives a significant speedup. This covers more cases likely to occur in real-world queries, for which using base-NBASE^2 arithmetic provides little benefit. To avoid code bloat and duplication, refactor it a bit using macros and exploiting the fact that some portions of the code are shared between the different cases. Dean Rasheed, reviewed by Joel Jacobson. Discussion: https://postgr.es/m/9d8a4a42-c354-41f3-bbf3-199e1957db97%40app.fastmail.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/.