IIS vs Kestrel performance comparison

Question

How does the performance of IIS look like comparing to a Kestrel http server?

Seems like Kestrel is significantly inspired by the family of asynchronous and event-dr

Answer 1

As of Nov 2016, straight from the ASP.NET benchmarks.

On Windows Server 2012, at a pipeline depth of 16:

stack        on       RT        requests/sec
ASP.NET 4.6  IIS      CLR           57,792 
ASP.NET 5    Kestrel  CoreCLR    1,188,521       

That's a 20x or 2000% speedup. I understand a full blown IIS vs standalong Kestrel but I do hope someone on the ASP.NET team can deep dive on this because the difference is tremendous.

That and why it's so much slower on Linux.