Memcache vs APC for a single server site data caching

Question

I have a single server site thats pushing 200k unqiues per day, and the traffic doubles roughly every 40 days (for the last 5 months anyway).

I pretty much only plan to

Answer 1

Im use IPB 3.1.4 with APC it works justy two times faster then without it.

Requests per second:    43.46 [#/sec] (mean)
Requests per second: 24.23 [#/sec] (mean)

Don't test IPB with memcached yet