From: Eleanor McHugh <eleanor@...>
Date: 2008-03-31T07:39:36+09:00
Subject: Re: Is ruby is faster than all Object oriented Scripting langs

On 30 Mar 2008, at 21:21, M. Edward (Ed) Borasky wrote:
> Eleanor McHugh wrote:
>> Many projects have requirements which are only loosely identified  
>> at the time of inception, but one that tends to be there from the  
>> very beginning is "should perform acceptably for users". Ignore  
>> that requirement at your peril :)
>
> Actually, there are implicit performance requirements based on  
> decades of usability theory.

I remember sitting through lectures on this stuff twenty years ago as  
part of a control engineering course at uni and it's stood me in good  
stead over the years: in fact when I was writing interactive cockpit  
systems the one second maximum response time requirement became so  
ingrained that it's now second nature.

Obviously with the web network latencies can make it difficult to  
display meaningful state updates on that kind of time-scale, but it  
still bugs me how many AJAX apps stall on large data transfers when  
the interface could be doing something to keep users engaged. It's a  
good thing for most of these systems that user expectations are so  
low...

Ellie

Eleanor McHugh
Games With Brains
http://slides.games-with-brains.net
----
raise ArgumentError unless @reality.responds_to? :reason