IPhoto is using 190% of the CPU

Question

Can anyone please advise why my iPhoto is using upto 190% of the CPU. The % does fluctuate but it is still high between 50% and 190%.
this does cause my MacBook to become slow and operates rather warm.

Answer 1

My iPhoto library is in pictures folder and I had ready carried out the repair prior to your reply. What if ant damage could have this caused and if I repeatedly get this message should I be concerned?
A repair can be necessary,
if iPhoto crashed or you force quit it. Then iPhoto may not be able to close all open files properly, and the internal databases can be left in an inconsistent condition.
It can be necessary, if the iPhoto library has been accessed from the Finder and not using the iPhoto interface.
It can be necessary, if the iPhoto library has been accessed by other applications, that try to clean your Mac or to save space.
If you are seeing reported prompts to repair, the library may be corrupted more than a simple repair can solve or your hard drive may be failing.  In that case make sure, you are having a good backup and try all options from the Library First Aid Tools, first of all repairing permissions, and then a "Rebuild Database".
If all fails, rebuild with iPhoto Library Manager (download here: iPhoto Library Manager), as described by Terence Devlin in this post:
uprgraded to yosemite all good but iphoto crashes every time I attempt to upgrade the photo library