Device stuck in bootloop after enabling ART I activated the Android Runtime (ART) instead of Dalvik and after that my phone rebooted but it seems that it's stuck in a bootloop.

Will the first bot after choosing ART take some extra time? How can I tell if it's stuck in a bootloop rather than just booting slowly?

My device is an HTC Explorer running CM 11 beta 4 build.
The first boot after swapping to ART generally takes a little longer to boot. After that it then recompiles every app using the new runtime before you can actually use the device. During this stage the device actually displays a message with it's current progress. If it never gets to that stage then there is a decent chance that Android is stuck trying to boot.

If it's stuck in a bootloop, you should see your phone continually swap from the HTC boot logo to the CM boot logo and back again. If it's stuck on just the CM boot logo then there is a chance that it is actually booting and just taking a long time.