Run results for: Trimming leading/trailing characters (multiple)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
✓ Index Multiple Char Version (Pawel O.)	103,549,560 Ops/sec
Index Version (Jason Larke)	1,343,273 Ops/sec
Substring Version (Pho3niX83)	425,689 Ops/sec
Boolean Filter Version (mbaer3000)	187,393 Ops/sec
Regex Version (leaf)	161,774 Ops/sec
Spread Version (Robin F.)	8,524 Ops/sec

Script Preparation code:

var TestString = '+'.repeat(200) + '='.repeat(20000) + '+'.repeat(200);

var regexTrim = function(str, ch) {
    if (ch === ']') ch = '\\]';
    else if (ch === '^') ch = '\\^';
    else if (ch === '\\') ch = '\\\\';
    return str.replace(new RegExp('^[' + ch + ']+|[' + ch + ']+$', 'g'), '');
};

function indexTrim(str, ch) {
    var start = 0, 
        end = str.length;

    while(start < end && str[start] === ch)
        ++start;

    while(end > start && str[end - 1] === ch)
        --end;

    return (start > 0 || end < str.length) ? str.substring(start, end) : str;
}

function booleanTrim(str, ch) {
    return str.split(ch).filter(Boolean).join(ch);
}

function spreadTrim(str, ch) {
    const first = [...str].findIndex(char => char !== ch);
    const last = [...str].reverse().findIndex(char => char !== ch);
    return str.substring(first, str.length - last);
}

function substringTrim(str, ch) {
    while(str.charAt(0)==ch) {
        str = str.substring(1);
    }

    while(str.charAt(str.length-1)==ch) {
        str = str.substring(0,str.length-1);
    }

    return str;
}

function trimSuffix(str, suffix) {
    let lastStrChar = str.length - 1, lastSuffixChar = suffix.length - 1;
    while (lastSuffixChar >= 0) {
        if (str[lastStrChar] !== suffix[lastSuffixChar]) return str;
        lastStrChar--;
        lastSuffixChar--;
    }
    return str.slice(0, lastStrChar + 1)
}

Tests:

Index Version (Jason Larke)
indexTrim(TestString, '+');
Regex Version (leaf)
regexTrim(TestString, '+')
Boolean Filter Version (mbaer3000)
booleanTrim(TestString, '+')
Spread Version (Robin F.)
spreadTrim(TestString, '+')
Substring Version (Pho3niX83)
substringTrim(TestString, '+')
Index Multiple Char Version (Pawel O.)
trimSuffix(TestString, '+')

Run results for: Trimming leading/trailing characters (multiple)

Index Version (Jason Larke)

Regex Version (leaf)

Boolean Filter Version (mbaer3000)

Spread Version (Robin F.)

Substring Version (Pho3niX83)

Index Multiple Char Version (Pawel O.)