A friend of mine and me got ourselves a fresh OnePlus One.
Although he is using stock kernel he recommended me to flash Franco's kernel.
In AnTuTu Benchmark we notice a quite significant performance drop:
Stock kernel: 48.xxx score
Franco kernel: 41.xxx score
Benchmarks itself were startet at the same time.
On the OnePlus One with Franco kernel it runs visibly behind (approx 10 seconds).
Do I need to worry?
Although battery life is very good, i'm thinking if I should go back to stock kernel...
i wouldn't worry. franco is famous for things down in order to increase battery life. i hit 51k on the ak kernel this monring. then overclocked and hit 53k. it is all a matter of what you want. if its battery life, then franco is the way to go. if it is performance and sheer speed, but you might have to charge every night, the run with ak.