Performance Implications of 4096-bit SSL Certificates -

I've read that these sites load at slow speed.

Lots of all * browsers will support 4096-bit keys The issue you will raise is that the big key slows down with the big key, which will increase the load on the server and the page on the client The loading will be slow.

I recently wanted to get a 4096-bit certificate and know some real word numbers and benchmark so that this is a wrong decision.