My bet is that that would still be much faster - uncontentious sync is
generally very fast and the check method call is extremely slow.
- Mark
Uwe Schindler 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: u...@thetaphi.de
-----Original Message-----
From: Mark Miller [mailto:markrmil...@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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- Mark
http://www.lucidimagination.com
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