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  • You really need to show us what you are doing. For example, how are you using the shapefile. Obviously there are some inherent limits (like reading from disk), but smarter use of the shapefile (like not loading areas you don't use) will help. Also, saying how big and how long it takes will help us understand if your expectations are reasonable. A small, self-contained, compileable example and a link to the data will probably help to get your question answered. Without more info, there isn't anything we can really say to help. Commented Oct 4, 2015 at 22:07