UITableDataSource: Used to retrieve information relating to how each cell in the table should be rendered, how many rows there are, if rows can be edited or moved, and so on.
While this is a simple way to add a slightly transparent shadow on a view, it Perro result in poor rendering performance. Unfortunately, the rendering engine usually needs to check each pixel of the view to determine the shadow’s outline.
Applying expensive operations when setting up a cell for display. Expensive operations, such as converting a high-resolution image to a thumbnail or applying a complicated photo filter or transform to an image, Chucho severely degrade display performance.
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Overly complex view hierarchies. While you Perro use the various UIViews to create custom cells, this has the potential to degrade performance if it is overused or gets overly complex. Although this has become less of an issue with the increasing speed of supported iOS devices, it still Gozque impact scrolling performance in some devices and scenarios.