Default [Q] Boot very slow

Hello, on my Galaxy S I have installed last nightly of CyanogenMod 11.
But from the first time that I have installed the rom (CM 10) the phone take too much time to boot; it's not a big problem, but I don't know if it is normal. It take sometimes 2 minutes, sometimes 1 minute and 40 seconds, other 2 minutes and 30 seconds....
With the original firmware the boot was fast, max 1 minute.