Edit in JSFiddle

// 33 ~ 126 ascii 가 문자.
var rxTest = /(\w+)=(\w+)/gi
var randStrList = getRandStrings(10000);
    
function getRandChar() {
    var charCode = Math.round(33 + ((126 - 33) * Math.random()));
    return String.fromCharCode(charCode);
}

function getRandomString() {
    var str = "";
    var MAX_LEN = 127;
    var len = Math.round(MAX_LEN * Math.random());
    while(len--) {
        str += getRandChar();
    }
    return str;
}

function getRandStrings(num) {
    var randStrs = [];
    for (var i=0; i<num; i++) {
        randStrs.push(getRandomString());
    }
    return randStrs;
}

testCases = {
    "String.search()" : function () {
        var matchCount = 0;
        for (var i=0, len = randStrList.length; i < len; i++) {
            var str = randStrList[i];
            if (str.search(rxTest) !== -1) {
                //console.log(str);
                matchCount++;
            }
        }
        return matchCount;
    },

    "String.match() with global" : function () {
        var matchCount = 0;
        for (var i=0, len = randStrList.length; i < len; i++) {
            var str = randStrList[i];
            if (str.match(rxTest)) {
                //console.log(str);
                matchCount++;
            }
        }
        return matchCount;
    },
    
    "String.match() without global" : function () {
        var matchCount = 0;
        rxTest.global = false;
        for (var i=0, len = randStrList.length; i < len; i++) {
            var str = randStrList[i];
            if (str.match(rxTest)) {
                //console.log(str);
                matchCount++;
            }
        }
        rxTest.global = true;
        return matchCount;
    },

    "Regex.exec()" : function () {
        var matchCount = 0;
        for (var i=0, len = randStrList.length; i < len; i++) {
            var str = randStrList[i];
            rxTest.lastIndex = 0;
            if (rxTest.exec(str) != null) {
                //console.log(str);
                matchCount++;
            }
        }
        return matchCount;
    },

    "Regex.test()" : function () {
        var matchCount = 0;
        for (var i=0, len = randStrList.length; i < len; i++) {
            rxTest.lastIndex = 0;
            var str = randStrList[i];
            if (rxTest.test(str)) {
                //console.log(str);
                matchCount++;
            }
        }
        return matchCount;
    },
    
    "String.search() again" : function () {
        var matchCount = 0;
        rxTest.global = false;
        for (var i=0, len = randStrList.length; i < len; i++) {
            var str = randStrList[i];
            if (str.search(rxTest) !== -1) {
                //console.log(str);
                matchCount++;
            }
        }
        rxTest.global = true;
        return matchCount;
    }
}

$(function(){
    var result = [];
    for (var funcName in testCases) {
        var testFunc = testCases[funcName]
        var stime = new Date();
        var matchCount = testFunc.call();
        var etime = new Date();
        result.push(funcName +"(matched:"+ matchCount +") ---> <em>"+(etime - stime)+ "</em> ms" );
        
        stime = new Date();
        matchCount = testFunc.call();
        etime = new Date();
        result.push(funcName +"(matched:"+ matchCount +") ---> <em>"+(etime - stime)+ "</em> ms" );


    }
    $('#output').html(result.join('<br />'));
});

<span id="output"></span>

em {font-weight: bold;}