cc988fbb0b
The original coding was quite fast so long as objects were always released in reverse order of addition; otherwise, it degenerated into O(N^2) behavior due to searching for the array element to delete. Improve matters by switching to hashed storage when the number of objects of a given type exceeds 64. (The cutover point is open to discussion, of course, but some simple performance testing suggests that hashing has enough overhead to be a loser below there.) Also, refactor resowner.c so that we don't need N copies of the array management code. Since all the resource IDs the code currently needs to deal with are either pointers or integers, it seems sufficient to create a one-size-fits-all infrastructure in which everything is converted to a Datum for storage. Aleksander Alekseev, reviewed by Stas Kelvich, further fixes by me
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. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.