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
parentNode 5777524.5 Ops/sec
parentNode !== undefined 1844641.9 Ops/sec
Script Preparation code:
Tests:
  • data.parentNode

  • data.parentNode !== undefined

  • data.parentNode != undefined