ASP.NET Dev Server (Cassini), IIS Express and multiple threads

I can't seem to find any information on this anywhere.

Either it's my imagination or the ASP.NET Dev Server (Cassini) cannot handle multiple threads (e.g. mult开发者_运维问答iple requests). Is this correct?

Does IIS Express handle multiple threads?

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Yes, functionally speaking, cassini processes one request at a time.

IIS Express is an almost full IIS implementation and will provide expected performance.