Run results for: Trimming multiple leading/trailing characters, no set constructor overhead

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36 Edg/93.0.961.38

Browser: Chrome 93

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Array single	267136.5 Ops/sec
Set single	199973.2 Ops/sec
Array double	234984.5 Ops/sec
Set double	170225.2 Ops/sec
Array 5	78295.0 Ops/sec
Set 5	68348.0 Ops/sec

Script Preparation code:

var testString = '+'.repeat(200) + '='.repeat(20000) + '+'.repeat(200);
var testString2 = '-'.repeat(200) + '='.repeat(20000) + '+'.repeat(200);
var testString3 = 'a'.repeat(200) + 'b'.repeat(200) + 'c'.repeat(200) + 'd'.repeat(200) + 'e'.repeat(200) + 'f'.repeat(200) + 'g'.repeat(200) + 'h'.repeat(200) + 'i'.repeat(200) + 'j'.repeat(200) + 'k'.repeat(200) + 'l'.repeat(200);

var testArray = ['+'];
var testSet = new Set(testArray);
var testArray2 = ['+', '-'];
var testSet2 = new Set(testArray2);
var testArray3 = ['a', 'b', 'c', 'd', 'e'];
var testSet3 = new Set(testArray3);

function trimAnySet(str, chars) {
    var start = 0, 
        end = str.length;

    while(start < end && chars.has(str[start]))
        ++start;

    while(end > start && chars.has(str[end - 1]))
        --end;

    return (start > 0 || end < str.length) ? str.substring(start, end) : str;
}

function trimAny(str, chars) {
    var start = 0, 
        end = str.length;

    while(start < end && chars.indexOf(str[start]) >= 0)
        ++start;

    while(end > start && chars.indexOf(str[end - 1]) >= 0)
        --end;

    return (start > 0 || end < str.length) ? str.substring(start, end) : str;
}

Tests:

Array single
trimAny(testString, testArray);
Set single
trimAnySet(testString, testSet);
Array double
trimAny(testString2, testArray2);
Set double
trimAnySet(testString2, testSet2);
Array 5
trimAny(testString3, testArray3);
Set 5
trimAnySet(testString3, testSet3);

Run results for: Trimming multiple leading/trailing characters, no set constructor overhead

Array single

Set single

Array double

Set double

Array 5

Set 5