I've installed the tiemu2 that appeared in maemo downloads. One thing I noticed immidiately is that it runs cpu cycles when idle. This drains the batteries real quick.
Could it potencially be related to performance issues?

Is there anyone here who could answer this question:
Why arm devices emulation on llinux cannot use n800 cpu like kqemu on PC?
Emulators (like 4-8MHz gameboy) run on mobilephones at full speed but not here?