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- Subject: Re: dynamic loading
- From: David Jeske <jeske@...>
- Date: Tue, 8 Dec 1998 11:03:21 -0800
On Tue, Dec 08, 1998 at 09:25:36AM -0200, Luiz Henrique de Figueiredo wrote:
> >From: Supratik Champati <email@example.com>
> >Also I was wondering if someone has already written (and would
> >graciously like to share)
> >some kind of lua add-on that would enable us to dynamically load object
> yes, someone here at TeCGraf has done that.
> it'll probably be part of Lua 3.2 (but as a library).
> >The reason I need this is that some functions are too time consuming to
> >be implemented in lua
> I assume you have profiled the code...
So far the stuff I've implemented outside of lua is more a result of
Lua not handling integers very well. For example, bitshifting.
So far the 'worst' performance Lua code I've made is a proto-style
'multiple-inheritence' and it's poor performance comes from:
1) deep nesting, which just means Lua has to walk many tables
- I want to setup a 'flattening cache' which will flatten all the
parent tables and then invalidate and reload if any of the
parent tables change. However, accessing non-reference types
is always going to involve more indirection than I want, the
minimum I can get it down to is:
Where I create a special table called a "reference_tbl" which
allows me to store a 'reference' to a string or integer by storing
the table it lives in and its index.
2) "false" is the same as "not present". Which means if I have a false
value somewhere, it has to parse the whole tree just to not find the
variable anywhere in the tree. I'm moving to using "0" and "1" for
booleans, but I really would like to have a proper boolean type.
David Jeske (N9LCA) + http://www.chat.net/~jeske/ + firstname.lastname@example.org