Debug mode's profiler says that event sheet 1 is all of the high% CPU utilization here. That should give you a hint of where the CPU usage is being drawn from.
You have multiple culprits here, apparently, which are:
*Your "Repeat 100 times" loop
*Your A function
*Your For Each SpriteFamily event-chain
All of these are draining about 50-70% in increased CPU usage, so you may want to improve them or find ways of doing this without constantly polling Construct 2 repeatedly. (i.e, per tick stuff, repeat x times, etc)