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From Earwin Burrfoot <ear...@gmail.com>
Subject Re: indexing_slowdown_with_latest_lucene_udpate
Date Mon, 10 Aug 2009 15:06:55 GMT
Or, we can just throw that detection out of the window, for less
smooth back-compat experience, less hacky code and no slowdown.

On Mon, Aug 10, 2009 at 19:02, Uwe Schindler<uwe@thetaphi.de> wrote:
> The question is, if that would get better if the reflection calls are only
> done one time per class using a IdentityHashMap<Class,Boolean>. The other
> reflection code in AttributeSource uses a static cache for such type of
> things (e.g. the Attribute -> AttributeImpl mappings in AttributeSource.
> DefaultAttributeFactory.getClassForInterface()).
>
> I could do some tests about that and supply a patch. I was thinking about
> that but throwed it away (as it needs some synchronization on the cache Map
> which may also overweigh).
>
> -----
> Uwe Schindler
> H.-H.-Meier-Allee 63, D-28213 Bremen
> http://www.thetaphi.de
> eMail: uwe@thetaphi.de
>
>> -----Original Message-----
>> From: Mark Miller [mailto:markrmiller@gmail.com]
>> Sent: Monday, August 10, 2009 4:48 PM
>> To: java-dev@lucene.apache.org
>> Subject: Re: indexing_slowdown_with_latest_lucene_udpate
>>
>> Robert Muir wrote:
>> > This is real and not just for very short docs.
>> Yes, you still pay the cost for longer docs, but it just becomes less
>> important the longer the docs, as it plays a smaller role. Load a ton of
>> one term docs, and it might be 50-60% slower - add a bunch of articles,
>> and it might be closer to 20%-15% (I don't know the numbers, but the
>> longer I made the docs, the less % slowdown, obviously). Still a good hit,
>> but a short doc test magnafies the problem.
>>
>> It affects things no matter what, but when you don't do much tokenizing,
>> normalizing, the cost of the reflection/tokenstream init dominates.
>>
>> - Mark
>>
>>
>>
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>
>
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>



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Kirill Zakharenko/Кирилл Захаренко (earwin@gmail.com)
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