Benchmark: String concatenation vs array join Chrome 4

Script Preparation code:

var str = "";
var i;
var sArr = [];

function encodePush(str) {
        if (!str || !str.length) {
            return '';
        }

        var strLength = str.length;
        var result = [];
        var i = 0;

        while (i < strLength) {
            var charInfo = charIndex[str.charCodeAt(i)];
            if (charInfo) {
                var alpha = charInfo[str.charCodeAt(i + 1)];
                if (alpha) {
                    i++;
                }
                else {
                    alpha = charInfo[''];
                }
                if (alpha) {
                    result.push("&"+alpha+";");
                    i++;
                    continue;
                }
            }
            result.push(str.charAt(i));
            i++;
        }

        return result.join('');
    }

function encodePlus(str) {
        if (!str || !str.length) {
            return '';
        }

        var strLength = str.length;
        var result = '';
        var i = 0;

        while (i < strLength) {
            var charInfo = charIndex[str.charCodeAt(i)];
            if (charInfo) {
                var alpha = charInfo[str.charCodeAt(i + 1)];
                if (alpha) {
                    i++;
                }
                else {
                    alpha = charInfo[''];
                }
                if (alpha) {
                    result += "&"+alpha+";");
                    i++;
                    continue;
                }
            }
            result += str.charAt(i);
            i++;
        }

        return result;
    }

Tests:

String concatentation
str = encodePlus('ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &' + Date.now())
Array join (w/ push)
str = encodePush('ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &ga8f6c54agdsuhgdasuyidgaiuhdga<> dasdas &' + Date.now())

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String concatentation
Array join (w/ push)

String concatenation vs array join Chrome 4 (version: 0)

Comparing performance of: String concatentation vs Array join (w/ push)

Created: one year ago by: Guest

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String concatentation

Array join (w/ push)

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results