What is the difference between Glyph cache and Image cache?

Answer

Image cache caches the content associated with the image that is downloaded from a specified URL. If the references will be made to the image multiple times then the image will be loaded from the cache and the time of loading will be less. The pattern or the process will be much more faster. Whereas Glyph cache is used for text based engine to produce rendered text files by rendering the fonts and its properties. Glyph optimizes the readability and increase the resolution of the text that has to be changed. It also applies to the dynamic change of the text and apply the visual properties dynamically.