Percepat Loading dengan Lazy Load

<script type='text/javascript'>
//<![CDATA[
// Lazy Load
(function(a) {
    a.fn.lazyload = function(b) {
        var c = {
            threshold: 0,
            failurelimit: 0,
            event: "scroll",
            effect: "show",
            container: window
        };
        if (b) {
            a.extend(c, b)
        }
        var d = this;
        if ("scroll" == c.event) {
            a(c.container).bind("scroll", function(b) {
                var e = 0;
                d.each(function() {
                    if (a.abovethetop(this, c) || a.leftofbegin(this, c)) {} else if (!a.belowthefold(this, c) && !a.rightoffold(this, c)) {
                        a(this).trigger("appear")
                    } else {
                        if (e++ > c.failurelimit) {
                            return false
                        }
                    }
                });
                var f = a.grep(d, function(a) {
                    return !a.loaded
                });
                d = a(f)
            })
        }
        this.each(function() {
            var b = this;
            if (undefined == a(b).attr("original")) {
                a(b).attr("original", a(b).attr("src"))
            }
            if ("scroll" != c.event || undefined == a(b).attr("src") || c.placeholder == a(b).attr("src") || a.abovethetop(b, c) || a.leftofbegin(b, c) || a.belowthefold(b, c) || a.rightoffold(b, c)) {
                if (c.placeholder) {
                    a(b).attr("src", c.placeholder)
                } else {
                    a(b).removeAttr("src")
                }
                b.loaded = false
            } else {
                b.loaded = true
            }
            a(b).one("appear", function() {
                if (!this.loaded) {
                    a("<img />").bind("load", function() {
                        a(b).hide().attr("src", a(b).attr("original"))[c.effect](c.effectspeed);
                        b.loaded = true
                    }).attr("src", a(b).attr("original"))
                }
            });
            if ("scroll" != c.event) {
                a(b).bind(c.event, function(c) {
                    if (!b.loaded) {
                        a(b).trigger("appear")
                    }
                })
            }
        });
        a(c.container).trigger(c.event);
        return this
    };
    a.belowthefold = function(b, c) {
        if (c.container === undefined || c.container === window) {
            var d = a(window).height() + a(window).scrollTop()
        } else {
            var d = a(c.container).offset().top + a(c.container).height()
        }
        return d <= a(b).offset().top - c.threshold
    };
    a.rightoffold = function(b, c) {
        if (c.container === undefined || c.container === window) {
            var d = a(window).width() + a(window).scrollLeft()
        } else {
            var d = a(c.container).offset().left + a(c.container).width()
        }
        return d <= a(b).offset().left - c.threshold
    };
    a.abovethetop = function(b, c) {
        if (c.container === undefined || c.container === window) {
            var d = a(window).scrollTop()
        } else {
            var d = a(c.container).offset().top
        }
        return d >= a(b).offset().top + c.threshold + a(b).height()
    };
    a.leftofbegin = function(b, c) {
        if (c.container === undefined || c.container === window) {
            var d = a(window).scrollLeft()
        } else {
            var d = a(c.container).offset().left
        }
        return d >= a(b).offset().left + c.threshold + a(b).width()
    };
    a.extend(a.expr[":"], {
        "below-the-fold": "$.belowthefold(a, {threshold : 0, container: window})",
        "above-the-fold": "!$.belowthefold(a, {threshold : 0, container: window})",
        "right-of-fold": "$.rightoffold(a, {threshold : 0, container: window})",
        "left-of-fold": "!$.rightoffold(a, {threshold : 0, container: window})"
    })
})(jQuery);
$(function() {
    $("img").lazyload({
        placeholder: "https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhIsZsG8xMcDMlcuNjhxcxILJHlvreVkHTSeWu7URFjAI4FwazqwC_XVSTnWc-jFAyukGmFAGwYHfUIK3mhARsvYgiDwWjZDu9IKEmGR4htx7wUuVLIvwzK4gHF_2qP_Q-FsurbXOz7OD6/s1600/imgload.gif",
        effect: "fadeIn",
        threshold: "-50"
    })
});
//]]>
</script>

gambar loadnya

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