Editing my library, lags and slows up the proccess

Question

while editing my library I find that the system lags and it becomes very frustrating when I have to wait for the system to do what I need it to do. I have one of macs most recent and their more powerful units. I do have quite an extensive music library that I am always trying to work with and get as much info on it as possible. I am becoming disappointed with how things are going and even concidering finding another media format. this is not what I prefer, but if I am unable to come to a good resolution for this I don't see a choice. any answers would be greatly appreciated.

Answer 1

Since you can click on it to delete it give this a try: Try the following:
1 - launch iPhoto with the Command+Option keys held down and rebuild the library.
2 - Run Option #4, Rebuild Database, followed by Option #1 if needed.
If that doesn't fix the problem continue with:
Using iPhoto Library Manager  to Rebuild Your iPhoto Library
Download iPhoto Library Manager and launch.
Click on the Add Library button,                         
and select the library you want to add from those in the selection window.
Now that the library is listed in the left hand pane of iPLM, click on your library and go to the Library ➙ Rebuild Library menu option
In the next  window name the new library and select the location you want it to be placed.
Click on the Create button.
Note 1: This creates a new library based on the LIbraryData.xml file in the library and will recover Events, Albums, keywords, titles and comments. However, books, calendars, cards and slideshows will be lost. (This is the downside to the method but it should give you functioning library with no bad actors in it.)
Note 2:  Your current library will be left untouched for further attempts at a fix if so desired.
OT