jquery empty append

JavaScript performance comparison

Test case created

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div id="a"></div>
<script>
Benchmark.prototype.setup = function() {
    var $div = $('#a');
    var nop = function(x){return x+1;};
    jQuery.fn.extend({
        append_: function(e) {
                if(!e || e === "" || e === null) return this;
                return this.append(e);
        }
    });
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
append empty string
$div.append("");
pending…
nop
var x = nop(1);
pending…
append null
$div.append(null);
pending…
append_ ""
$div.append("");
pending…
append_ null
$div.append(null);
pending…

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