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From (Steven J. Owens)
Subject Re: Context specific summary with the search term
Date Thu, 25 Oct 2001 21:18:59 GMT
Lee Mallabone wrote:
> Okay, I'm now not entirely certain how useful a generic solution will be
> to me, given the non-generic nature of the content I'm indexing. I think
> there a lot of optomizations I can make that wouldn't be generic.

     "Early optimization is the root of all evil."  

     Seriously, though, one thing I see Doug say often is that
lucene's indexing and searching are designed to be extremely fast.  He
often responds to questions about odd details - for example, the
classic "do a search and cache the search results for paging across
multiple web pages" - by saying to just use the brute force approach
and rely on the speed of the lucene index.  

     I like to say, I assume that there are people out there with a
lot more on the ball than me about things like optimization.  I try to
use their brains as much as possible :-).  For example, with
compilers, I assume the compiler writer knew a lot more about
optimization than I do.  People talk about the compiler not having the
human judgement to know what's best.  That's true, but the way to deal
with that is not to try to hand-optimize my code and outguess the
compiler (which will only will only confuse the compiler and prevent
it from doing what it was designed to do).  The compiler can best
optimize the program if I focus on making it clear what my intent is,
what the program is meant to do, in the structure of the code first.

     This leads to another optimization slogan that I remember reading
- algorithmic optimization is much better than spot optimization.  In
other words, before you try to figure out a faster way to do
something, figure out if you're doing the thing that accomplishes your
true goal in the fastest way.  And figure out how important that thing
is in the grand scheme of things.

Steven J. Owens

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