Significance of bool IsReusable in http handler interface

Question

When writing a http handler/module, there is an interface member to implement called - bool IsReusable.

What is the significance of this member? If I set it to false (or

Answer 1

If you don't store any state in that instance (i.e.: you don't have any fields (aka "class variables")) then you should be safe reusing it.

It's by default false to be on the safe side.