[Openmcl-devel] Lisp Comparison

[Joshua Kordani]

What are CLOS/nonCLOS based streams?


On 4/19/17 4:31 AM, Rainer Joswig wrote:
>> Am 19.04.2017 um 05:39 schrieb Craig Lanning <craig.t.lanning at gmail.com>:
>>
>> On Tue, 2017-04-18 at 16:34 -0700, David McClain wrote:
> ...
>
>> Yes, all code is compiled.  No code is run interpreted.  It is designed
>> the way it is specifically for that reason.
> Things I would usually look for:
>
>
> * is everything compiled?
>
> * slow stream I/O
>
> * slow unbuffered stream I/O
>    -> for example when reading lines allocating a new string for each line
>    -> or generally unbuffered streams with a lot of character operations
>
> * slow CLOS-based stream I/O -> in CCL CLOS based streams are usually slower than non-CLOS streams
>
> * slow unicode stream operations
>
> * slow unicode string operations
>
> * repeated translation between character representations in strings
>
> * excessive consing / slow garbage collection time -> use TIME to see the GC time
>
> * excessive FLOAT consing -> CCL needs more declarations / tricks
>
> * forgotten calls to the sleep function ;-)
>
> * lots of background output/logging/tracing, debug options enabled
>
> * time sensitive functions compiled with the wrong compiler optimizations
>
> * tail calls not optimized, when needed
>
> * algorithmic problems in user code or in the implementation: n^2 or worse complexity
>    -> consing to the end of a list
>     -> copying arrays in loops
>     -> adjusting strings by one element
>
>
>
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