Comment by qhwudbebd

I'm interested in their last step, in which they set

  vm.dirty_ratio = 40
  vm.dirty_background_ratio = 10
  vm.swappiness=10

  governor=performance
  energy_perf_bias=performance
  min_perf_pct=100

to raise a surprisingly low performance ceiling.

I can't believe they were under any memory pressure, so the first three presumably made no difference, but it's also quite surprising to me that the default ondemand cpu governor was responsible for such a dramatic performance hit. Not throttling up quickly enough leading to higher latency maybe? Very interesting anyway.