Improve Performance ( slow computer )

Hi everyone! I am a design engineer at Howell Plastics. I am working on a tray like part that has many cavities all the same just patterned around. The part is 23 x 16 and the cavities are .625" x .50". I am able to fit 400 cavities. Needless to say this creates a very large file and it slows my computer down a lot. Any Suggestions? 

SolidworksGeneral