The longer you play and the bigger the file gets, the longer it will take to load. You can try clearing your cache files. Delete these four files in Documents/Electronic Arts/Sims 3...
Also, if you play any custom worlds, including Riverview and Barnacle Bay, then empty the World Caches folder. Do not delete the folder...just delete what is in it.
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compositorCache.package
simCompositorCache.package
scriptCache.package
CASPartCache.package
Also, if you play any custom worlds, including Riverview and Barnacle Bay, then empty the World Caches folder. Do not delete the folder...just delete what is in it.