Is there any performance testing data for Zend_Search_Lucene?

[xeoshow]

Hello,
    From the official site overview, I saw the following:
======================================

Zend_Search_Lucene

• ......
  
• 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.