[Proposal] Reduce information for GIF files with $option_extra_info

[RobertLang]

Hi,
when using getID3 to store meta information on different file formats I noticed that the information returned for GIF files is way too large and it takes quite some time.

Wouldn't it make sense to use the $option_extra_info (or another option) to skip information on global_color_table and extension_blocks to make processing more efficient?

Thanks for considering.

[JamesHeinrich]

The global_color_table still needs to be read/skipped (although parsing it into actual table values is not required). extension_blocks need to be parsed to check whether the GIF is animated or not.
However I can make it not return that data if option_extra_info is false. You might save a millisecond or two by not expanding the global color table, but it's not a whole lot faster.
Changed in fe4e0a5