Run results for: parseInt vs toString vs string literal vs + empty string

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

string literal a number

28.2M/s

add empty string to number

27.7M/s

add empty string to string

25.9M/s

string literal a string

19.6M/s

toString a number

14.8M/s

toString a string

14.4M/s

parseInt a number

1.9M/s

parseInt a string

1.6M/s

View exact numbers

Test name	Executions per second
✓ string literal a number	28,242,462 Ops/sec
add empty string to number	27,736,540 Ops/sec
add empty string to string	25,903,146 Ops/sec
string literal a string	19,633,814 Ops/sec
toString a number	14,837,847 Ops/sec
toString a string	14,394,832 Ops/sec
parseInt a number	1,851,577 Ops/sec
parseInt a string	1,590,688 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());
string literal a number
numbers.forEach(n => `${n}`);
string literal a string
strNumbers.forEach(n => `${n}`);
add empty string to number
numbers.forEach(n => n + "");
add empty string to string
strNumbers.forEach(n => n + "");