Run results for: replace character at the end of the string yes

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser: Chrome 108

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
replace	345166.8 Ops/sec
substring	1172648.0 Ops/sec

Script Preparation code:

var tests = [
  "bobl/ajs(lkfjq+wiejrf!aksdjf!kasjerfijqwef==", 
  "lkajsdlf/j!wjjqiaeruopqweijrfkj!kja!skdjf=", 
  "laksjdflkjqoweirjoqiwjefdlaksdjfliqwjefoiasjdfol"
];

Tests:

replace
for (let test of tests){ test.replace(/=+$/, "") }
substring
for (let test of tests){ test.substring(0, test.length - (test[test.length-2] === "=" ? 2 : test[test.length-1] === "=" ? 1 : 0)) }

Run results for: replace character at the end of the string yes

replace

substring