Would be useful to think through a robust and flexible logging mechanism to quickly hone in on layers and query performance without being in compiled debug mode.
Would target the PostGIS plugin but potentially also the SQLite/oracle plugins.
Potentially could expose options like:
Look at https://github.com/mapnik/mapnik/compare/debug-plugins there is some progress in this regard (both debug and statistics). It's a starting point and needs some refinements, but it's a start.
This was already implemented in #937. Closing.