From: Alex Young <alex@...>
Date: 2007-08-03T02:16:23+09:00
Subject: Re: sytnax

dblack@rubypal.com wrote:
> Hi --
> 
> On Thu, 2 Aug 2007, Phlip wrote:
> 
>> Shai Rosenfeld wrote:
>>
>>>> var = { 1 => 'one', 2 => 'two', 3 => 'three' }.fetch(number, 'else')
>>>
>>> nice! :)
>>>
>>> any lead to which one is faster?
>>
>> D'OH!
>>
>> (There was just a big discussion on Ruby performance, or lack thereof.
>> Google "Performance diffrence between ifs and case", and learn A>
>> premature optimization is the root of all evil, and B> you can profile
>> each system with unit tests and Benchmark library.)
> 
> Not all optimization is premature, and it's not the case that no
> information is available to people before they start to code
> something, or even just out of academic or scientific interest quite
> apart from any particular coding project.
> 
> There's a long history of quite interesting discussion about
> performance on this list, often involving benchmark reports (and
> therefore explicitly in the knowledge of the relevance of the
> benchmarking process).  Those discussions can be very illuminating,
> and I'd prefer not to see them routinely squashed before they have a
> chance to start.
They're only going to get more interesting in future, as we have more 
different implementations to play with, too...

-- 
Alex