Is it better to execute many sql commands with one connection, or reconnect every time?

Question

Here\'s my test code, which seems to suggest that it\'s better to connect multiple times instead of connecting just once.

Am I doing something wrong?

Answer 1

SqlClient will pool your connections. In your first case with one open, it will do the job of opening the connection. Every other run will use the pooled connection. If you reverse your order and do "many connections" first, I would expect you to see the opposite result.