Run results for: IIFE vs eval()

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:94.0) Gecko/20100101 Firefox/94.0

Browser: Firefox 94

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
eval	17793.1 Ops/sec
iife	7348912.0 Ops/sec

Script Preparation code:

var result;

Tests:

eval
eval("(function(){var sum = 0; for (var i = 1; i < 100; i++){sum += i;} return sum;}());");
iife
(function(){var sum = 0; for (var i = 1; i < 100; i++){sum += i;} return sum;}());