Run results for: object compare

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36

Browser: Chrome 70

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
deepEquals	269872.5 Ops/sec
stringifyEquals	493423.2 Ops/sec
Object.prototype.equals	489464.5 Ops/sec
Lodash isEqual	850552.4 Ops/sec
underscore isequal	377939.8 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/underscorejs/1.5.1/underscore-min.js"></script>
<script>window.underscore = _.noConflict()</script>
<script src="https://cdn.jsdelivr.net/lodash/3.10.1/lodash.min.js"></script>
<script>window.lodash = _.noConflict()</script>

Script Preparation code:

var base = {};
base.deepEquals = function(a, b) {
    if (typeof a != typeof b) {
        return false;
    }

    if (typeof a != "object") {
        return a == b;
    }

    if (a instanceof Array) {
        if (!(b instanceof Array)) {
            return false;
        }

        if (a.length != b.length) {
            return false;
        }

        for (var i = 0; i < a.length; i++) {
            if (!base.deepEquals(a[i], b[i])) {
                return false;
            }
        }

        return true;
    }

    var aKeyCount = 0;
    for (var key in a) {
        aKeyCount++;
        if (!(key in b)) {
            return false;
        }

        if (!base.deepEquals(a[key], b[key])) {
            return false;
        }
    }

    var bKeyCount = 0;
    for (var key in b) {
        if (!(key in a)) {
            return false;
        }
        bKeyCount++;
    }

    return aKeyCount == bKeyCount;
};

    Object.prototype.equals = function (x, deep) {
        if (deep) {
            if (x == this) return true;

            var p;
            for (p in this) {
                if (typeof (x[p]) == 'undefined') { return false; }
            }

            for (p in this) {
                if (this[p]) {
                    switch (typeof (this[p])) {
                        case 'object':
                            if (!this[p].equals(x[p])) { return false; } break;
                        case 'function':
                            if (typeof (x[p]) == 'undefined' ||
                      (p != 'equals' && this[p].toString() != x[p].toString()))
                                return false;
                            break;
                        default:
                            if (this[p] != x[p]) { return false; }
                    }
                } else {
                    if (x[p])
                        return false;
                }
            }

            for (p in x) {
                if (typeof (this[p]) == 'undefined') { return false; }
            }

            return true;
        }
        return x == this;
    }

base.stringifyEquals = function(a, b) {
    return JSON.stringify(a) === JSON.stringify(b);
};

a = {
   tableHeight: 50,
   topOffsets: [1, 2, 3, 4, 5]
};
b = {
   tableHeight: 50,
   topOffsets: [1, 2, 3, 4, 5]
};

Tests:

deepEquals
base.deepEquals(a, b)
stringifyEquals
base.stringifyEquals(a, b)
Object.prototype.equals
a.equals(b, true)
Lodash isEqual
lodash.isEqual(a,b)
underscore isequal
underscore.isEqual(a,b)

Run results for: object compare

deepEquals

stringifyEquals

Object.prototype.equals

Lodash isEqual

underscore isequal