Comment

Peter Bengtsson

Yeah. Which makes sense. For zip files, the whole thing can't be subdivided. In other words, c4.large==c4.Nxlarge

See my (second) update about using c5.

Parent comment

Darek

Rule of thumb: newer instance types are generally faster. Try C5 instance. Looks like Python script can't use all cores and you just benchmarking single core performance.