Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36
Chrome 81
Windows
Desktop
4 years ago
Test name Executions per second
data.parentNode 2849447.0 Ops/sec
data.parentNode !== undefined 1333066.0 Ops/sec
data.parentNode != undefined 1394176.0 Ops/sec
Script Preparation code:
Tests:
  • data.parentNode

  • data.parentNode !== undefined

  • data.parentNode != undefined