Run results for: typof vs null - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:53.0) Gecko/20100101 Firefox/53.0

Browser: Firefox 53

Operating system: Windows

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
typoef	362373248.0 Ops/sec
null	361581120.0 Ops/sec
typof neg	359357024.0 Ops/sec
null neg	364439776.0 Ops/sec

Script Preparation code:

obj = {"kl":"jl"};

Tests:

typoef
if(typeof obj["kl"] === "undefined") var n = 2;
null
if(obj["kl"]) var n = 3;
typof neg
if(typeof obj["ka"] === "undefined") var n = 2;
null neg
if(obj["ka"]) var n = 3;

;