Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:73.0) Gecko/20100101 Firefox/73.0
Firefox 73
Windows
Desktop
4 years ago
Test name Executions per second
undefined w/ type 310790900.0 Ops/sec
undefined w/o type without type check 311346800.0 Ops/sec
typeof equal to 296941800.0 Ops/sec
typeof equal to without type check 293646000.0 Ops/sec
with brackets around typeof unequal 312245400.0 Ops/sec
with brackets around typeof equal 314312100.0 Ops/sec
with brackets around typeof unequal with type check 316164000.0 Ops/sec
with brackets around typeof equal with type check 310190500.0 Ops/sec
Script Preparation code:
Tests:
  • undefined w/ type

  • undefined w/o type without type check

  • typeof equal to

  • typeof equal to without type check

  • with brackets around typeof unequal

  • with brackets around typeof equal

  • with brackets around typeof unequal with type check

  • with brackets around typeof equal with type check