Python Processor

[Martin P. Hellwig]

John Nagle wrote:
<cut - and out of context>
> CPython's performance problems
> come from excessive dictionary lookups, not from instruction decode.
> 
>                 John Nagle

Could you please suggest some background information/links to this?
I tried to Google for it but unsurprisingly any combination with 
'cpython' and 'performance' results (to me that is) in a haystack of rants.

I did find http://www.python.org/dev/peps/pep-0339/ but I would ideally 
like to read something more in depth but still in reasonable easy language.

-- 
MPH
http://blog.dcuktec.com
'If consumed, best digested with added seasoning to own preference.'