I am looking at image file formats and I would like to know which of png, gif, jpeg, bmp and tiff is the most efficient in terms of loading and displaying image data. I don’t care about the file size on the disk, just the amount of processor needed to display the images on an embedded device such as Android, iPhone or Windows Phone.
I think that an uncompressed format would be most efficient in terms of processing, since you do not need any processing to decompress it. But you pay the cost of a larger file. BMP and TIFF are two uncompressed formats in the list of options you select.
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I tested it only on desktop computers, but on mobile devices the speeds should remain the same. Although mobile processors may not be as fast to decompress, memory is also usually slower.