Javascript hashmap vs. if vs. case

gistfile1.js

//console.time implementation for IE
if (window.console && typeof (window.console.time) == "undefined") {
    console.time = function (name, reset) {
        if (!name) {
            return;
        }
        var time = new Date().getTime();
        if (!console.timeCounters) {
            console.timeCounters = {}
        };
        var key = "KEY" + name.toString();
        if (!reset && console.timeCounters[key]) {
            return;
        }
        console.timeCounters[key] = time;
    };

    console.timeEnd = function (name) {
        var time = new Date().getTime();
        if (!console.timeCounters) {
            return;
        }
        var key = "KEY" + name.toString();
        var timeCounter = console.timeCounters[key];
        if (timeCounter) {
            var diff = time - timeCounter;
            var label = name + ": " + diff + "ms";
            console.info(label);
            delete console.timeCounters[key];
        }
        return diff;
    };
}

var withIf = function (conditionCount, stringKeys, coerce) {
        var key = function (i) {
                return stringKeys ? "'" + i + "'" : i
            },
            equals = coerce ? "===" : "==",
            funcParts = ["function(x) {"];
        if (conditionCount > 0) funcParts.push("if(x " + equals + " 0) { return true; } ");
        for (var i = 1; i < conditionCount; i++) {
            funcParts.push("else if(x " + equals + " " + key(i) + ") { return true; }");
        }
        if (conditionCount > 0) funcParts.push("else { return false; } ");
        funcParts.push("}")

        return Function("return " + funcParts.join("\n"))();
    },
    withHash = function (conditionCount, stringKeys) {
        var key = function (i) {
                return stringKeys ? "'" + i + "'" : i
            },
            f = ["return (function() {"],
            f2 = [];
        f.push("		var hashMap = {");
        for (var i = 0; i < conditionCount; i++) {
            f2.push(key(i) + ": function() { return true; }");
        }
        f.push(f2.join(",\n"));
        f.push("  };");
        f.push("  return function(x) {");
        f.push("    return hashMap[x] ? hashMap[x]() : false;");
        f.push("  }");
        f.push("})()");
        return Function(f.join("\n"))();
    },
    withCase = function (conditionCount, stringKeys) {
        var key = function (i) {
                return stringKeys ? "'" + i + "'" : i
            },
            funcParts = ["function(x) {", "  switch(x) {"];
        for (var i = 0; i < conditionCount; i++) {
            funcParts.push("    case " + key(i) + ": return true;break;");
        }
        funcParts.push("    default: return false;");
        funcParts.push("  }")
        funcParts.push("}")

        return Function("return " + funcParts.join("\n"))();
    };

var conditions = 100,
    test = null,
    testTimes = 15000;

test = withIf(conditions, false, false);
console.time('with if int keys no coerce');
for (var times = 0; times < testTimes; times++) {
    for (var i = 0; i < conditions; i++) {
        test(i);
    }
}
console.timeEnd('with if int keys no coerce');

test = withIf(conditions, false, true);
console.time('with if int keys with coerce');
for (var times = 0; times < testTimes; times++) {
    for (var i = 0; i < conditions; i++) {
        test(i);
    }
}
console.timeEnd('with if int keys with coerce');


test = withIf(conditions, true, false);
console.time('with if string keys no coerce');
for (var times = 0; times < testTimes; times++) {
    for (var i = 0; i < conditions; i++) {
        test(i.toString());
    }
}
console.timeEnd('with if string keys no coerce');

test = withIf(conditions, true, true);
console.time('with if string keys with coerce');
for (var times = 0; times < testTimes; times++) {
    for (var i = 0; i < conditions; i++) {
        test(i.toString());
    }
}
console.timeEnd('with if string keys with coerce');


console.time('with hash int keys');
test = withHash(conditions, false);
for (var times = 0; times < testTimes; times++) {
    for (var i = 0; i < conditions; i++) {
        test(i);
    }
}
console.timeEnd('with hash int keys');

console.time('with hash string keys');
test = withHash(conditions, false);
for (var times = 0; times < testTimes; times++) {
    for (var i = 0; i < conditions; i++) {
        test(i.toString());
    }
}
console.timeEnd('with hash string keys');

console.time('with case int keys');
test = withCase(conditions, false);
for (var times = 0; times < testTimes; times++) {
    for (var i = 0; i < conditions; i++) {
        test(i);
    }
}
console.timeEnd('with case int keys');

console.time('with case string keys');
test = withCase(conditions, false);
for (var times = 0; times < testTimes; times++) {
    for (var i = 0; i < conditions; i++) {
        test(i.toString());
    }
}
console.timeEnd('with case string keys');