The beat the song is built on is one bar, played through bars 25-31, 33-38 and 49-55, and 3 more places -- 26.7% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 84 out of 100 -- hard -- and the thing that decides that is how many notes a second it asks for.
The whole song is 78 out of 100, so the beat is most of what the song asks for. Get it clean and the rest follows.
A part this hard is not learned by playing it slowly and hoping. The room opens it on its simplest reduction -- the timekeeper alone, at 102 BPM -- and adds the notes back over 5 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 102, 123, 143, 164 and 185 BPM, and the gate at each one is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A one-bar groove on hi-hat, snare and kick, in 4/4 at 185 BPM, counted in sixteenth notes. It is written out above, and it covers 26.7% of the bars the kit plays.
Bars 25-31, 33-38, 49-55 and 86-91, and 2 more places. The time is kept on the silence to start with, and it changes 15 times over the song.
84 out of 100 on its own -- hard. The song as a whole is 78 out of 100: demanding, mostly on how many notes a second it asks for.