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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Test name	Executions per second
✓ parseInt a number	109,923,440 Ops/sec
add empty string to number	109,673,256 Ops/sec
string literal a number	109,509,896 Ops/sec
add empty string to string	95,952,936 Ops/sec
string literal a string	45,735,916 Ops/sec
String constructor on a string	32,321,870 Ops/sec
toString a number	26,995,610 Ops/sec
toString a string	25,914,776 Ops/sec
String constructor on a number	20,568,506 Ops/sec
parseInt a string	11,348,308 Ops/sec

Test name

Executions per second

✓ parseInt a number

109,923,440 Ops/sec

add empty string to number

109,673,256 Ops/sec

string literal a number

109,509,896 Ops/sec

add empty string to string

95,952,936 Ops/sec

string literal a string

45,735,916 Ops/sec

String constructor on a string

32,321,870 Ops/sec

toString a number

26,995,610 Ops/sec

toString a string

25,914,776 Ops/sec

String constructor on a number

20,568,506 Ops/sec

parseInt a string

11,348,308 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 + "");
String constructor on a number
numbers.forEach(n => String(n));
String constructor on a string
strNumbers.forEach(n => String(n));