Hi Martin,
I have been doing some testes on EPiServer 5 on the following setup:

Server: quad core Intel Xeon E5335 with 4 GB of ram.
Single server setup: (So site and database on the same server)

1000 pages in a EPiServer cms 5 SP2
Pages pr. second with 1000 concurrent users:
Without caching: 364
With caching: 883

10.000 pages in a EPiServer cms 5 SP2
Pages pr. second with 1000 concurrent users: 
Without caching:254
With caching:430

100.000 pages in a EPiServer cms 5 SP2
Pages pr. second with 1000 concurrent users: 
Without caching:184
With caching:515

Note that adding a server so that the database is taken away from the system will give you better performance and if you really need the power adding a load balanced set of frontends will kick it up a nudge as well..

As you mentioned this stuff is difficult to measure because no site is the same, no images the same size and no network configures 100% the same and so on...

So I guess what I'm saying is that no matter what, make sure that the site is developed with performance in mind, the structure of the site is important (deep is better than wide!) and giving the system more hardware will improve performance!

I hope this answers your question..?

/Knudsen
EPiServer Denmark

Hi Martin,

Should you need more performance tips I would recomend reading/watching Steve Celius Developer summit presentation.

/Petter