Run results for: Checking if number is integer

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:124.0) Gecko/20100101 Firefox/124.0

Browser: Firefox 124

Operating system: Windows

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
Modulus 1	1008.2 Ops/sec
Number.isInteger	946.4 Ops/sec

Script Preparation code:

var numbers = [];
for(let i = 0; i < 100000;i++)
{
	numbers.push(Math.random()*100000);
	numbers.push(Math.floor(Math.random()*100000));
}
numbers.sort( (a,b) => (0.5)-Math.random());

Tests:

Modulus 1
let integerCount = 0; for(let i = 0; i < numbers.length;i++) { if(!(numbers[i]%1)) { integerCount+=1; } }
Number.isInteger
let integerCount = 0; for(let i = 0; i < numbers.length;i++) { if(Number.isInteger(numbers[i])) { integerCount+=1; } }

Run results for: Checking if number is integer

Compares using num % 1 to number.isInteger

Modulus 1

Number.isInteger