Run results for: IIFE vs direct call vs no function

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Windows

Device Platform: Desktop

Date tested: one month ago

Script Preparation code:

function sum(x) { var res = 0; for (var i = 0; i < x; ++i) res += i; return res; }

Tests:

IIFE
(function(x) { var res = 0; for (var i = 0; i < x; ++i) res += i; return res; })(100)
Function call
sum(100)
Direct code
var x = 100; var res = 0; for (var i = 0; i < x; ++i) res += i;