Run details:
Mozilla/5.0 (Windows NT 6.2; WOW64; Trident/7.0; rv:11.0) like Gecko
IE 11
Windows 8
Desktop
3 years ago
Test name Executions per second
delete o.p; 30682212.0 Ops/sec
o.p = undefined; 10733219.0 Ops/sec
Script Preparation code:
Tests:
  • delete o.p;

  • o.p = undefined;