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From Andi Vajda <a...@osafoundation.org>
Subject Re: lucene 1.3 RC3 compiled with gcj
Date Wed, 03 Dec 2003 17:22:11 GMT

The numbers are the ones that are displayed by the lucene
org.apache.lucene.demo.IndexFiles demo, I assume the clock is started after
the VM has loaded.

Andi..

On Wed, 3 Dec 2003, Dmitry Serebrennikov wrote:

> Andi Vajda wrote:
>
> >I got the latest lucene to compile and run its demo on Linux (redhat 9) and
> >Mac OS X Panther 10.3.1 using gcc 3.3.2's gcj, compiling to native
> >executables.
> >
> >The demo seems to run. I didn't run the unittests since I didn't attempt to
> >compile junit with gcj yet.
> >
> >Performance seems way faster than the java VM version but somewhat slower than
> >clucene's C++ port of lucene, indexing a small set of files. I say somewhat as
> >my set is not that large and my measurements not very thorough, but here are
> >some numbers for indexing 116k of text in 14 files, as measured on a Powerbook
> >1Ghz/1GB running Mac OS X Panther 10.3.1:
> >
> >  lucene 1.3 RC3 with java 1.4.1: 1169 ms
> >  lucene 1.3 RC3 with gcj       :  467 ms
> >  clucene 0.8.9                 :  365 ms
> >
> This is very interesting! I didn't even know about the clucene project,
> but now I'll definetely have to take a look! I was beginning to think
> about doing this myself, but if the code already exists - so much the
> better. gcj sounds great too.
> Are these times for pure indexing, or is this a time for the program to
> run. If so, the extra 1 second could just be due to the VM startup
> time... The numbers would be much less impressive if that was the case.
> Also, if you have numbers for a larger dataset, please post them here. I
> am very interested in these results, and I think many others might be also.
>
> Thanks.
> Dmitry.
>
>
>
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