reverted inserter optimisation
  Performed 1000 updates in 15633.247 ms
  avg: 15.633 ms, min: 13.313 ms, max: 18.931 ms

  Performed 1000 updates in 15462.104 ms
  avg: 15.462 ms, min: 13.309 ms, max: 20.441 ms

  Performed 1000 updates in 15597.467 ms
  avg: 15.597 ms, min: 13.267 ms, max: 18.797 ms

  Performed 1000 updates in 15544.477 ms
  avg: 15.544 ms, min: 13.351 ms, max: 18.730 ms

  Performed 1000 updates in 15468.829 ms
  avg: 15.469 ms, min: 13.332 ms, max: 18.882 ms

  Performed 1000 updates in 15479.336 ms
  avg: 15.479 ms, min: 13.323 ms, max: 18.879 ms

  Performed 1000 updates in 15454.156 ms
  avg: 15.454 ms, min: 13.273 ms, max: 18.868 ms

  Performed 1000 updates in 15474.484 ms
  avg: 15.474 ms, min: 13.338 ms, max: 18.982 ms

  Performed 1000 updates in 15381.667 ms
  avg: 15.382 ms, min: 13.245 ms, max: 18.798 ms

  Performed 1000 updates in 15365.685 ms
  avg: 15.366 ms, min: 13.231 ms, max: 18.747 ms

with inserter optimisation
  Performed 1000 updates in 15450.198 ms
  avg: 15.450 ms, min: 13.237 ms, max: 22.231 ms

  Performed 1000 updates in 15502.079 ms
  avg: 15.502 ms, min: 13.230 ms, max: 21.770 ms

  Performed 1000 updates in 15429.640 ms
  avg: 15.430 ms, min: 13.215 ms, max: 21.841 ms

  Performed 1000 updates in 15661.426 ms
  avg: 15.661 ms, min: 13.343 ms, max: 21.954 ms

  Performed 1000 updates in 15409.115 ms
  avg: 15.409 ms, min: 13.251 ms, max: 22.679 ms

  Performed 1000 updates in 15382.968 ms
  avg: 15.383 ms, min: 13.282 ms, max: 22.512 ms

  Performed 1000 updates in 15410.326 ms
  avg: 15.410 ms, min: 13.204 ms, max: 22.096 ms

  Performed 1000 updates in 15413.650 ms
  avg: 15.414 ms, min: 13.256 ms, max: 22.052 ms

  Performed 1000 updates in 15356.502 ms
  avg: 15.357 ms, min: 13.260 ms, max: 21.975 ms

  Performed 1000 updates in 15397.430 ms
  avg: 15.397 ms, min: 13.218 ms, max: 22.262 ms