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

In general, .NET's connection pooling should make it 'not matter' as it does a great job of recycling connections for you. But my practice is to use a single connection for a bunch of transactions I know will be taking place together. I think your timings are an indication of the connection pool doing its job and just plain variations in runs.