The beat the song is built on is one bar, played through bars 23-29, 43-49 and 51-57, and 3 more places -- 33.7% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on ride, hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 89 out of 100 -- hard -- and the thing that decides that is how many notes a second it asks for.
The whole song is 87 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 61 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 61, 73, 85, 98 and 110 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 ride, hi-hat, snare and kick, in 4/4 at 110 BPM, counted in sixteenth notes. It is written out above, and it covers 33.7% of the bars the kit plays.
Bars 23-29, 43-49, 51-57 and 91-97, and 2 more places. The time is kept on the hi-hat to start with, and it changes 8 times over the song.
89 out of 100 on its own -- hard. The song as a whole is 87 out of 100. Hard, and what makes it hard is the speed of the hand keeping time.