Run results for: IIFE vs Normal function

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:98.0) Gecko/20100101 Firefox/98.0

Browser: Firefox 98

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
iifeFn	80023.0 Ops/sec
normalFn	73118.7 Ops/sec

Script Preparation code:

var iifeFn = (() => {
  return window.location !== window.parent.location;
})();

var normalFn = () => {
  return window.location !== window.parent.location;
};

Tests:

iifeFn
console.log(iifeFn)
normalFn
console.log(normalFn())