Thanks for the note. TechEmpower is doing benchmark test for all frameworks(http://www.techempower.com/benchmarks/#section=data-r5), in that JSF is missing. we have not yet received a Git hub pull request with a JSF implementation of the tests. If you have time to do the implementation yourself, we’d gladly receive a JSF pull request!
They put this into a Github issue for the time being.
Mark Ashworth 
May 24, 2013 at 8:23 pm
Hi,
Thanks for the note. TechEmpower is doing benchmark test for all frameworks(http://www.techempower.com/benchmarks/#section=data-r5), in that JSF is missing. we have not yet received a Git hub pull request with a JSF implementation of the tests. If you have time to do the implementation yourself, we’d gladly receive a JSF pull request!
They put this into a Github issue for the time being.
https://github.com/TechEmpower/FrameworkBenchmarks/issues/307
If plan to consider JSF, try it in following scenario
A) Plain JSF Test
1) Mojarra
2) Myfaces
B) JSF + Primefaces
C) JSF + Icefaces
D) JSF + Richfaces