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

Run details:

User agent: Mozilla/5.0 (Android 13; Mobile; rv:109.0) Gecko/115.0 Firefox/115.0

Browser: Firefox Mobile 115

Operating system: Android

Device Platform: Mobile

Date tested: 11 months ago

Test name	Executions per second
parseInt a number	29147320.0 Ops/sec
parseInt a string	1925572.0 Ops/sec
toString a number	2108766.0 Ops/sec
toString a string	6349736.0 Ops/sec
string literal a number	2202828.0 Ops/sec
string literal a string	14991800.0 Ops/sec
add empty string to number	1243582.0 Ops/sec
add empty string to string	27606430.0 Ops/sec
String constructor on a number	6922161.0 Ops/sec
String constructor on a string	4122140.0 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());
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));

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

parseInt a number

parseInt a string

toString a number

toString a string

string literal a number

string literal a string

add empty string to number

add empty string to string

String constructor on a number

String constructor on a string