The current implementation of parameter substitution (text protocol) is written in pure Python and is too slow, compared to other MariaDB Connectors.

Instead, parameter substitution should be handled in C code.

In order to avoid unnecessary memory consumption, this should ideally be implemented using a (not yet existing) stream send function.

The send function could be implemented in Connector/C or as a fallback in Connector/Python by writing directly to the socket (which can be obtained via the C/C API).