Is there any performance testing data for Zend_Search_Lucene?

[xeoshow]

Hello,
From the official site overview, I saw the following:
======================================
Zend_Search_Lucene<http://framework.zend.com/manual/en/zend.search.lucene.html>

- ......
- provides binary compatibility with Apache Lucene
- matches Apache Lucene in performance

======================================

By "matches Apache Lucene in performance", is there any performance
testing data or comparison for this point? Since my website is a big one,
and performance is an important factor for it...
Thanks a lot.