No gain for 2ndboot roms (ics>=), with the obvious exception of some problematic bl versions(the lower ones) which have issues booting up. But if your bl version allows you to boot 2ndboot roms, its effect ends there.
It's a different story for stock kernel based roms, because walter79 had posted a bl5 kernel which was known to be one of the better ones (unable to test myself because I have bl7)
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Last edited by thekguy; 24th January 2014 at 08:01 PM.