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/605.1.15 (KHTML, like Gecko) Version/26.5.2 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 13 days ago

Normal function (non-strict)

7.3M/s

Normal function (strict)

7.2M/s

Arrow function (non-strict)

7.2M/s

Arrow function (strict)

7.1M/s

Dynamic function (non-strict)

7.1M/s

Dynamic function (strict)

7.1M/s

View exact numbers

Test name	Executions per second
✓ Normal function (non-strict)	7,311,827 Ops/sec
Normal function (strict)	7,182,856 Ops/sec
Arrow function (non-strict)	7,163,939 Ops/sec
Arrow function (strict)	7,143,782 Ops/sec
Dynamic function (non-strict)	7,092,416 Ops/sec
Dynamic function (strict)	7,085,714 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();