Run results for: Trimming leading/trailing characters array

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 Edg/114.0.1823.58

Browser: Chrome 114

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Index Version (Jason Larke) (with array)	7771.9 Ops/sec
Index Version (Jason Larke)	8549649.0 Ops/sec

Script Preparation code:

var TestString = '-=+'.repeat(200) + '='.repeat(20000) + '=+-'.repeat(200);

function indexTrim(str, ch) {
    var start = 0, 
        end = str.length;

    while(start < end && ch.includes(str[start]))
        ++start;

    while(end > start && ch.includes(str[end - 1]))
        --end;

    return (start > 0 || end < str.length) ? str.substring(start, end) : str;
}
function indexTrimSingle(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;
}

Tests:

Index Version (Jason Larke) (with array)
indexTrim(TestString, ['+','=','-']);
Index Version (Jason Larke)
indexTrimSingle(TestString, '-');

Run results for: Trimming leading/trailing characters array

Index Version (Jason Larke) (with array)

Index Version (Jason Larke)