Run results for: test5 delete - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/7.0)

Browser: IE 10

Operating system: Windows 8

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
delete o.p	29175440.0 Ops/sec
delete o["p"]	29379150.0 Ops/sec
o.p = undefined	11091410.0 Ops/sec
o["p"] = undefined;	10816900.0 Ops/sec
o.p = null	71930020.0 Ops/sec
o["p"] = null	75011890.0 Ops/sec

Website performance monitoring

Script Preparation code:

var o = { p: "p" };

Tests:

delete o.p
delete o.p;
delete o["p"]
delete o["p"];
o.p = undefined
o.p = undefined;
o["p"] = undefined;
o["p"] = undefined;
o.p = null
o.p = null;
o["p"] = null
o["p"] = null;