[Openmcl-devel] Lisp Comparison

David McClain dbm at refined-audiometrics.com
Tue Apr 18 17:25:00 PDT 2017

Wow, sorry about the confusion here… That really does sound like plain interpreted code versus natively compiled code. A good bytecode compiler / closure “interpreter” will give 5:1. But I have seen 100:1 in simple minded interpreters vs native code. Looks like something is really off here.

Definitely, a profile is called for. I truly doubt that the underlying Lisp implementation is at fault. 

- DM

> On Apr 18, 2017, at 16:54, Pierpaolo Bernardi <olopierpa at gmail.com> wrote:
> On Wed, Apr 19, 2017 at 1:34 AM, David McClain
> <dbm at refined-audiometrics.com> wrote:
>> Still, if running something like this produces results on a laptop, does it really matter whether it happens in 7 sec or 30 sec? Is this the kind of code that would be placed into continuous service and production? Or just something to give you some answers to chew on?
> It's 8 seconds vs 24 minutes, 180 times slower. It certainly does matter.
> (I have never observed such a big difference between sbcl and cll,
> thought. Something very unusual must be going on)

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