AFAICT Closures are still much faster than Function.prototype.bind.<p>(<a href="http:&#x2F;&#x2F;jsperf.com&#x2F;bind-vs-closure-setup&#x2F;44" rel="nofollow">http:&#x2F;&#x2F;jsperf.com&#x2F;bind-vs-closure-setup&#x2F;44</a>)<p>Could anyone who knows more about the implementation details point to an explanation of what&#x27;s going on under the surface?