EllisLab/CodeIgniter — pull request #992 by narfbg (2012-01-27 09:40:34+00:00)
Title: Improve the MySQLi database driver

Changes include:

- Method/property visibility declarations
- Added persistent connection support
- Switched `_version()` to use `mysqli_get_server_info()` instead of running an SQL query.
- Removed an unused property (`CI_DB_mysqli_driver::use_set_names`)
- Speed improvements
- General clean up