ASP.NET MVC 3 Razor performance

Question

(new answer to respond to your RC2 numbers)

Thanks for the updated numbers. A few points:

1. Your Aspx numbers look good, in the sense that we expect MVC3 Aspx to be on par with MVC2 Aspx (a bit slower in such a Hello World example is expected)
2. Your Razor numbers look suspect. We know Razor is a bit slower than the equivalent Aspx, however, the difference should be no larger than 5%-7%. Your numbers indicate 50% slower, which simply does not match up with our results. Check if the project compiles in Release and you have debug="false" set in web.config.
3. Your CPU utilization is a bit suspect. With 1000 concurrent requests the CPU should be utlized 100%. (Even only 8 concurrent requests should be enough since you have 8 virtual cores)
4. Your tests are running for about 20-25 seconds. That's a bit on the low side because a short (1-2 seconds) burst of activity elsewhere in the system could throw off your results quite significantly.
5. Related to point 4, did you run each scenario once or a few times? Are you seeing much variance in the results? Since your OS is doing other things in the background it's typical to see different results between runs.

How did you perform the benchmark? Was your site deployed on IIS in mode Release? Did you use the <deployment retail="true" /> section in your machine.config? Also remember that ASP.NET MVC 3 is still under heavy development so you cannot expect it to be fully optimized yet. At least wait until it hits RTM.