Multi-DB, instead of 4096 variables...

I would like to make multi db 4096 variables faster by NOT loading it.

add_db_server('000', 'dc1', 1, 1,'','', 'db_000', 'database', 'abc123');
add_db_server('001', 'dc1', 1, 1,'','', 'db_001', 'database', 'abc123');
add_db_server('fff', 'dc1', 1, 1,'','', 'db_fff', 'database', 'abc123');

How can I make it such that I can load this into my test server and make it run faster?

e.g. modifying db.php so that

add_db_server('000..fff', 'dc1', 1, 1,'','', 'db_000..fff', 'database', 'abc123');

meaning, I would like all the databases to be 000 or fff using and same username and password.

Modification to db.php only. I'm using multi-db 3.1

Can anyone help? Thanks. Loading all 4096 databases is too inefficient if I can just make it for my testing server.