In a large bowl, using a whisk, combine white sugar, brown sugar, corn syrup, eggs, salt, vanilla, melted butter, and cinnamon until smooth. Pour gently over the chopped pecans, and bake for 50 minutes or until the center of the pie is just a bit jiggly. If it starts to brown at the top, place a piece of foil loosely on top of it. Let it cool completely before serving.