[Q] 2Q about framework & CPU hotplug

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http://forum.xda-developers.com – Greetings members, I have simplistic framework installed & I want to install Xposed framework to use greenify donation extra features, will I get ROM problems(any kind of problems)? Q2; what is better for battery life having 2 or three cores working at high Freq., or having all 4 cores working at average Freq. ? For my expectations, i think all on is better than 2 or 3 with high Freq. , but I need an expert answer Thanks in advance for your help & cooperation. Regards ☆ ★*اِزْرَعْ تَحْص&#1 (HowTos)