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From "Zhang, Lisheng" <Lisheng.Zh...@BroadVision.com>
Subject RE: lucene 4.3 seems to be much slower in indexing than lucene 3.6?
Date Sun, 28 Jul 2013 06:05:58 GMT
Hi,

That's a very good point, I will test with a more realistic text
(like a novel).

Thanks very much for helps, Lisheng

-----Original Message-----
From: Michael McCandless [mailto:lucene@mikemccandless.com]
Sent: Saturday, July 27, 2013 3:42 AM
To: Lucene Users
Subject: Re: lucene 4.3 seems to be much slower in indexing than lucene
3.6?


It's also possible 4.x is slower than 3.x for purely random terms: the
terms dictionary is completely different.

But purely random terms is a poor test since it doesn't match the
reality of a typical search index.

Mike McCandless

http://blog.mikemccandless.com


On Fri, Jul 26, 2013 at 2:55 PM, Zhang, Lisheng
<Lisheng.Zhang@broadvision.com> wrote:
>
> Hi,
>
> I did some basic performance testing, just use random number to generate
> text for indexing,
> below I attached source java code. The command I used are:
>
> java TestReal43 index -docCount 500 -start 1 -optimize true -luceneDir mmap
> java TestReal36 index -docCount 500 -start 1 -optimize true -luceneDir mmap
>
> The difference is NOT in optimization, I changed directory within (Simple,
> MMap, NIOFS),
> it does not make much difference, 43 is about 30~40% slower. I conducted
> test in Linux:
>
> Linux ec2usevmsstgamq 3.2.0-49-virtual #75-Ubuntu SMP Tue Jun 18 17:59:38
> UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
>
> Thanks very much for helps, Lisheng
>
>
>
>
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