Run results for: Determining if a variable is an object

Compares three ways of determining if a variable is an object. - Check if object by comparing value to an object instantiated from the value - Using typeof - Using instanceof

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
Check if object by comparing value to an object instantiated from the value - passing in an object	85065192.0 Ops/sec
Check if object by comparing value to an object instantiated from the value - passing in a string	23683478.0 Ops/sec
Check if object by comparing value to an object instantiated from the value - passing in a string object	87515440.0 Ops/sec
Check if object by comparing value to an object instantiated from the value - passing in an integer	32428818.0 Ops/sec
Check if object by using instanceof - passing in an object	111343112.0 Ops/sec
Check if object by using instanceof - passing in a string	128180232.0 Ops/sec
Check if object by using instanceof - passing in a string object	109949168.0 Ops/sec
Check if object by using instanceof - passing in an integer	135158704.0 Ops/sec
Check if object by using typeof - passing in an object	134372272.0 Ops/sec
Check if object by using typeof - passing in a string	119427768.0 Ops/sec
Check if object by using typeof - passing in a string object	138662704.0 Ops/sec
Check if object by using typeof - passing in an integer	131702312.0 Ops/sec

Script Preparation code:

let objVal = {
  "a" : "a",
  "b" : "b"
};

let strObjVal = new String("hello");

let strVal = "hello";

let intVal = 23;

Tests:

Check if object by comparing value to an object instantiated from the value - passing in an object
let isObject = (objVal == Object(objVal) && !(objVal instanceof String));
Check if object by comparing value to an object instantiated from the value - passing in a string
let isObject = (strVal == Object(strVal) && !(strVal instanceof String));
Check if object by comparing value to an object instantiated from the value - passing in a string object
let isObject = (strObjVal == Object(strObjVal) && !(strObjVal instanceof String));
Check if object by comparing value to an object instantiated from the value - passing in an integer
let isObject = (intVal == Object(intVal) && !(intVal instanceof String));
Check if object by using instanceof - passing in an object
let isObject = (objVal instanceof Object && !(objVal instanceof String));
Check if object by using instanceof - passing in a string
let isObject = (strVal instanceof Object && !(strVal instanceof String));
Check if object by using instanceof - passing in a string object
let isObject = (strObjVal instanceof Object && !(strObjVal instanceof String));
Check if object by using instanceof - passing in an integer
let isObject = (intVal instanceof Object && !(intVal instanceof String));
Check if object by using typeof - passing in an object
let isObject = (typeof objVal != "object" && !(objVal instanceof String));
Check if object by using typeof - passing in a string
let isObject = (typeof strVal != "object" && !(strVal instanceof String));
Check if object by using typeof - passing in a string object
let isObject = (typeof strObjVal != "object" && !(strObjVal instanceof String));
Check if object by using typeof - passing in an integer
let isObject = (typeof intVal != "object" && !(intVal instanceof String));

Run results for: Determining if a variable is an object

Compares three ways of determining if a variable is an object. - Check if object by comparing value to an object instantiated from the value - Using typeof - Using instanceof

Check if object by comparing value to an object instantiated from the value - passing in an object

Check if object by comparing value to an object instantiated from the value - passing in a string

Check if object by comparing value to an object instantiated from the value - passing in a string object

Check if object by comparing value to an object instantiated from the value - passing in an integer

Check if object by using instanceof - passing in an object

Check if object by using instanceof - passing in a string

Check if object by using instanceof - passing in a string object

Check if object by using instanceof - passing in an integer

Check if object by using typeof - passing in an object

Check if object by using typeof - passing in a string

Check if object by using typeof - passing in a string object

Check if object by using typeof - passing in an integer