tim

with traits there is no performance penalty.
Traits are method dictionary and at composition time, the class 
methodDict gets the methods pointing to the
traits methodDict compiledmethod and we use pain normal method lookup. 
So from an execution point of view traits are flatten at composition 
time in the classes so NO PENALTY (except that you should use accessors 
for iv access).
For the browser feedback (which is far the most advanced for feedback 
than normal browser)
nathanael designer a good cache algorithm that support incremental 
addition of method in classes.

Stef

On 24 févr. 05, at 7:01, Tim Rowledge wrote:

> "Lex Spoon" <lex at cc.gatech.edu> wrote:
>
>> Martin Wirblat <sql.mawi at t-link.de> wrote:
>>> Here are Squeak's current problems ordered by importance:
>>>
>>> 1) library
>>> 2) speed
>
>>
>> I don't see speed as an issue for us.  Why do you put it at the #2 
>> slot?
>>  We aren't going to win over users who need a *really* fast
>> program-execution system.  On the other hand, I worry that if we think
>> about speed too much, we might mess up some of the things that are
>> great.
> Well, I see speed as an issue because on a regular seeming basis
> somebody or other manages to put something in the image that cripples
> interactive performance. Basic compute speed is really pretty
> impressive - even on a very slow machine like my 600MHz ARM box - but
> the UI varies from ok to unusable depending on update level.
>
> OK, so I can hear people telling me to get a real machine (I actually
> have several, including a dual cpu 1GHz pMac and a 1.5GHz pBook) but
> honestly, a machine that can hit 29 Dorado on the GreenBook benchmarks
> really shouldn't have problems making a menu select at decent speed nor
> a text view type as fast as my ancient arthritic fingers can hit keys.
> The venerable ActiveBook managed all of 27% Dorado and could do better.
> Yes, monochrome and yes, no window system to get in the way, but still.
>
> Besides, there are lots of potential Squeak machines with the same cpu
> and memory system that I have, plus the burden of winCE; think of all
> those 2/4/600 MHz PDAs out there, yearning for decent software. And
> don't forget the LinkSys/ASUS NAS boxlets in need of software. We can
> do better.
>
> And besides (again) with graphics/UI performance improved sensibly we
> could write Doom in Squeak.
>
>
> tim
> --
> Tim Rowledge, tim at sumeru.stanford.edu, http://sumeru.stanford.edu/tim
> Computers talk to each other worse than their designers do.
>