knockoutjs: Slow options bindingHandler

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/sugar/1.3.8/sugar.min.js"></script>
<form>
    <select data-bind="options: items"></select>
    <input type="button" data-bind="click: toggleSign" value="toggle sign">
</form>

JavaScript

var itemsHolder = [];
for (var i=0; i<195; ++i) {
    itemsHolder.push(i)
}

var model = {
    items: ko.observableArray(itemsHolder)
};

model.toggleSign = function() {
    for (var i = 0; i < itemsHolder.length; i++) {
        itemsHolder[i] = -itemsHolder[i];        
    }
    model.items(itemsHolder);
};

ko.applyBindings(model);