Run results for: Function vs dynamic function vs strict dynamic function

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Dynamic function (non-strict)

4.4M/s

Dynamic function (strict)

4.4M/s

Arrow function (strict)

3.5M/s

Arrow function (non-strict)

3.5M/s

Normal function (strict)

3.5M/s

Normal function (non-strict)

3.5M/s

View exact numbers

Test name	Executions per second
✓ Dynamic function (non-strict)	4,386,032 Ops/sec
Dynamic function (strict)	4,372,859 Ops/sec
Arrow function (strict)	3,485,085 Ops/sec
Arrow function (non-strict)	3,482,401 Ops/sec
Normal function (strict)	3,480,926 Ops/sec
Normal function (non-strict)	3,465,201 Ops/sec

Script Preparation code:

function funcPN() {
  let r = Math.random().toString(36).substring(7).includes('x');
}
function funcPS() {
  "use strict";
  let r = Math.random().toString(36).substring(7).includes('x');
}
var funcAN = () => {
  let r = Math.random().toString(36).substring(7).includes('x');
}
var funcAS = () => {
  "use strict";
  let r = Math.random().toString(36).substring(7).includes('x');
}
var funcDN = new Function("let r = Math.random().toString(36).substring(7).includes('x');");
var funcDS = new Function("\"use strict\";let r = Math.random().toString(36).substring(7).includes('x');");

Tests:

Normal function (non-strict)
funcPN();
Normal function (strict)
funcPS();
Arrow function (non-strict)
funcAN();
Arrow function (strict)
funcAS();
Dynamic function (non-strict)
funcDN();
Dynamic function (strict)
funcDS();