Lisp programmers know the value of everything and the cost of nothing ;)
On Saturday, February 23, 2013, Marko Topolnik wrote:
> I tend to think clojure is in a similar position - fast enough for the
>> vast majority of things (ymmv of course - depending on what your domain is)
>> and if you meet a situation like this where optimising the clojure becomes
>> too ugly, you can drop down to Java (or indeed C!)
>>
>
> Not quite, I'd say. In Java, and I bet it wasn't very different with C in
> the '80s, the most natural way to solve a problem is already the most
> performant, or at least within 50% of that. If you ever need to optimize,
> it means you are doing something very, very critical indeed, and probably
> involving native system resources in a way not idiomatically supported by
> Java's abstractions.
>
> In Clojure this is nohwere close to being true. Idiomatic Clojure is
> concise, expressive, and *slow.* Not 50% slower; not 100% slower; more
> like 100 *times* slower. Optimized Clojure is like a completely different
> language. Have you ever experienced the culture shock of opening core.clj?
> On the other hand, have you ever studied String.java or ArrayList.java? No
> surprises there; just the basic Java you write every day.
>
> On the other hand, an attitude that you are nevertheless likely to
> encounter on this grous is "It's not Clojure; it's you. Clojure already has
> all you need to achieve native performance. If that's not what you are
> seeing, don't blame it on Clojure". Many posters feel put down by that kind
> of attitude and the worst part it, it really isn't their fault.
>
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