My client gave me a set of 13 icons to use in some print and web materials that I am designing for an event. They are simple one color icons with a sketchy kind of look, and the original file they gave me was an .ai. The problem is, any time I try to work with them, Illustrator moves really, really, really slowly. I click on the icons and it take a full 5 seconds to select them. I try to move them and it takes 15-20 seconds for Illustrator to register the move. This is making the design process unbearably frustrating. Any ideas on why Illustrator is struggling with them? What can I do to make it run faster? I have not had any other performance issues, so I'm sure it's the icons. I wouldn't use them, but my client specifically requested that I implement them in the designs.
Here are some of the icons: