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When running all (or just many) of our tests, a significant portion of both CPU time and IO is spent running initdb. Most of those initdb runs don't specify any options influencing properties of the created data directory. Avoid most of that overhead by creating a "template" data directory, alongside the temporary installation. Instead of running initdb, pg_regress and tap tests can copy that data directory. When a tap test specifies options to initdb, the template data directory is not used. That could be relaxed for some options, but it's not clear it's worth the effort. There unfortunately is some duplication between pg_regress.c and Cluster.pm, but there are no easy ways of sharing that code without introducing additional complexity. Reviewed-by: Daniel Gustafsson <daniel@yesql.se> Discussion: https://postgr.es/m/20220120021859.3zpsfqn4z7ob7afz@alap3.anarazel.de
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: https://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 https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.