Does Output Buffering help in performance?

Question

I've heard that writing out the entire ASP.NET page in one go helps performance. Like having the following as the first line on Page_Load:

Response.BufferOutput = true;

And using Response.Flush at the end of all processing.

Does this help? If yes, are there any the disadvantages in using it?

Answer 1

It only helps if it is the bottleneck. How did you measure?