Show HN: multimethod.js - a Clojure-inspired multimethod library for JavaScript

Neat! I made something (I think) similar a while back, also inspired by Clojure. Mine's more of a proof-of-concept, as I have zero Clojure experience outside some very casual reading.<p><a href="https://github.com/brian-c/patterned-function" rel="nofollow">https://github.com/brian-c/patterned-function</a>

I like this very much. It's like a lightweight dispatcher/router/alternative to tons of switches/if &#38; elses. And also that the source is very short and readable.

Nice stuff, I liked the approach.<p>But what is the benchmark for this kind of structure against regular JS workflow? I guess it will be slower, but how much ?

in coffeescript:<p><pre><code> fib = (n) -&#62; switch n when 0 then 0 when 1 then 1 else fib(n-1) + fib(n-2) alert fib 20</code></pre>