Run results for: parseInt vs toString vs unary(+)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36

Browser: Chrome 85

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
parseInt a number	606949.8 Ops/sec
parseInt a string	493130.6 Ops/sec
toString a number	5241768.0 Ops/sec
toString a string	5935221.5 Ops/sec
unery convert to number from number	9254457.0 Ops/sec
unery convert to number from string	3103656.0 Ops/sec

Script Preparation code:

var numbers = [1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789];
var strNumbers = ["1", "12", "123", "1234", "12345", "123456", "1234567", "12345678", "123456789"];

Tests:

parseInt a number
numbers.forEach(n => parseInt(n, 10));
parseInt a string
strNumbers.forEach(n => parseInt(n, 10));
toString a number
numbers.forEach(n => n.toString());
toString a string
strNumbers.forEach(n => n.toString());
unery convert to number from number
numbers.forEach(n => +n);
unery convert to number from string
strNumbers.forEach(n => +n);

Run results for: parseInt vs toString vs unary(+)

parseInt a number

parseInt a string

toString a number

toString a string

unery convert to number from number

unery convert to number from string