The melody of This Is What You Came For by Calvin Harris runs 369 notes across 71 bars, 2:52 long in Am at 124 beats per minute. The tab sits almost entirely in the first two frets, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? This Is What You Came For chords and lyrics.