[Openmcl-devel] Performance tips

[Erik Pearson]

Hi Gary,

On Jun 21, 2006, at 5:10 PM, Gary Byers wrote:

> You may want to look at "ccl:library;chud-metering.txt".
>
> Offhand, I'd have no idea why "a web app" would be any faster or
> slower in any particular implementation; that'd probably depend on
> what the application does and how it does it.  The interface to
> CHUD isn't perfect, but it can often give you a clearer idea of
> what your application's actually doing than you'd get from other
> means.

Thanks, I'll try CHUD.

The "web app"ness of this problem means to me that the app

- is multiprocessing
- does a lot of network i/o
- does a lot of string (both array and list of chars)
- does a fair bit of file system work

Not implied is that it relies on extensively on CLOS within several  
major areas of the code (http protocol, url handling, web app plugin.)

The web app handles all http traffic, all file access, etc. It is not  
a page-serving Apache module thing ala mod_lisp.

Not knowing how I've implemented this I realize there is not much for  
you go to on.

However, all things being equal (i.e. my less than optimal  
implementation of the above!), the app did slow down and I'm hoping  
to rectify this. I'll try CHUD!

Thanks,
Erik.

>
> On Wed, 21 Jun 2006, Erik Pearson wrote:
>
>> Hi Gary et al,
>>
>> I am just switching  a web app over from Allegro to OpenMCL, and have
>> observed a performance degradation. I'm wondering if someone has a
>> list of openmcl performance issues that need tackling? Or even a gut
>> feeling of areas to look into?  I'd be happy to dig in and do some
>> grunt work. I need to weigh this against running the app on SBCL /
>> CMUCL on Linux, although I'd rather, for now, stay on the Mac  
>> platform.
>>
>> Thanks,
>> Erik.
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>>