Which song has the hardest drum tab is of course a matter of opinion. But, several message boards for drums mention the song “Bleed” by Meshuggah. For those of you not sure what a drum tab (short for tabular) is, it is like sheet music but much easier to read and write.
Tabs are not written with musical notes but rather with letters and other markings because they are written specifically for the instrument. Drum tabs indicate the necessary components needed to play the drums for a particular song and they are usually written by drummers for drummers.