(sorry if you received an earlier mail from me that was half-formed, I hit
send by accident)
Hi there, I'm quite new to Clojure, and was trying to do some very simple
benchmarking with other languages. I was surprised by the floating-point
results I got, which differed (for the same calculatio
t; Jon.
>
>
>
> *From:* clo...@googlegroups.com [mailto:
> clo...@googlegroups.com ] *On Behalf Of *Glen Fraser
> *Sent:* 05 February 2014 13:17
> *To:* clo...@googlegroups.com
> *Subject:* Confused by Clojure floating-point differences (compared to
> other languages)
>
4, at 6:22 PM, Konrad Hinsen
wrote:
> --On 5 Feb 2014 05:17:13 -0800 Glen Fraser wrote:
>
>> My benchmark iteratively runs a function 100M times: g(x) <-- sin(2.3x) +
>> cos(3.7x), starting with x of 0.
>
> A quick look at the series you are computing suggests th
its but I would mention that it would
> possibly make a significant performance difference if you added this to your
> code:
>
> (set! *unchecked-math* true)
>
>
>
> On Wednesday, February 5, 2014 7:17:13 AM UTC-6, Glen Fraser wrote:
> (sorry if you received an e
(recur (dec i) (g x)) x)))
>
> This is nearly 50% faster than the original version on my machine. Note that
> x is bound to 0.0 in the loop, which allows the optimized g to be invoked.
>
>
> On Wed, Feb 5, 2014 at 4:41 PM, Glen Fraser wrote:
> Thanks to both of you for th
ackOverflow question.
>
> As most probably all your versions use the same native libraries or hardware
> instructions, the differences must rely either on float configuration
> parameters, like rounding modes, or the order of operations.
>
> On Wednesday, February 5, 2014 1
