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From: Erik Hatcher <erik@ehatchersolutions.com>
Subject: Re: Lucene vs. Ruby/Odeum
Date: Wed, 1 Jun 2005 19:39:27 -0400
To: java-dev@lucene.apache.org


On Jun 1, 2005, at 6:07 PM, Daniel Naber wrote:

> On Tuesday 17 May 2005 04:41, Otis Gospodnetic wrote:
>
>
>> http://www.zedshaw.com/projects/ruby_odeum/performance.html
>>
>
> Here's a follow up:
> http://www.zedshaw.com/projects/ruby_odeum/odeum_lucene_part2.html
>
> Now the claim is that Lucene is faster than Ruby/Odeum but it takes 36
> times more memory. However, I cannot find any information on how  
> exactly
> Lucene was started. It's no surprise that Java requires much memory  
> and
> doesn't clean up if it never comes close to the limit set with -Xmx.

I went around several times in e-mail with Zed, the author of this  
comparison after his follow-up.  His paraphrasing of me in there is  
only partially sort of what I said to him.  He's instantiating an  
IndexSearcher inside a tight loop which I told him was a very bad  
thing to do with Lucene and that his loops are so tight that garbage  
collection isn't getting a chance to kick in.  He doesn't currently  
believe some of this from me, and also feels that adjusting the code  
to make Lucene happy is being unfair.

I wish the RubyLucene folks would hurry up and get a port over there  
so that we could compare against Ruby/Odeum "fairly" :)

     Erik


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