It's a pretty good trade-off with a heterogeneous application workload. There is a "to the metal" mode in ASP.NET/IIS now, mentioned in that article, that lets

It's a pretty good trade-off with a heterogeneous application workload. There is a "to the metal" mode in ASP.NET/IIS now, mentioned in that article, that lets you use the IOCP thread directly in your applications and avoid that context switch. But, of course, if you do blocking things there it will completely block your web server.