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From "Doron Cohen (JIRA)" <>
Subject [jira] Commented: (LUCENE-1540) Improvements to contrib.benchmark for TREC collections
Date Tue, 01 Feb 2011 07:47:28 GMT


Doron Cohen commented on LUCENE-1540:

Thanks for the review Shai!
All comments accepted.
Good catch with the int[] - added that sometimes and forgot to cleanup.
I think ZIP can wait for another day - let's get this one in.
Note that we are using [CompressorInputStream.createCompressorInputStream()|,]
which at version 1.1 only supports BZIP2 and GZIP. But the docs for Compress specify ZIP as
well - so I guess this is possible, just needs a deeper dig into, in another issue, which,
I guess, should also upgrade benchmark/compress from 1.0 to 1.1 (solr already uses 1.1).

bq. do you think the performance gain (of not allocating a String in the SB variant) is worth
the code dup?
I think so, it is a rather short method, will add a javadoc clarification.

> Improvements to contrib.benchmark for TREC collections
> ------------------------------------------------------
>                 Key: LUCENE-1540
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/benchmark
>            Reporter: Tim Armstrong
>            Assignee: Doron Cohen
>            Priority: Minor
>             Fix For: 3.1, 4.0
>         Attachments: LUCENE-1540.patch, LUCENE-1540.patch
> The benchmarking utilities for  TREC test collections ( are quite
limited and do not support some of the variations in format of older TREC collections.  
> I have been doing some benchmarking work with Lucene and have had to modify the package
to support:
> * Older TREC document formats, which the current parser fails on due to missing document
> * Variations in query format - newlines after <title> tag causing the query parser
to get confused.
> * Ability to detect and read in uncompressed text collections
> * Storage of document numbers by default without storing full text.
> I can submit a patch if there is interest, although I will probably want to write unit
tests for the new functionality first.

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