[Plugin: WP Search] Very slow to save posts when enabled

I’m using WP Search 2(.0.4.0) on a site with around 200 pages and custom post types. Search works fine but saving any page or post takes over 30 seconds.

I tried profiling a save with XDebug and the result says that most of the time is spent in Zend_Search_Lucene_Index_SegmentMerger->_mergeStoredFields()

I’m running on Apache 2, PHP 5.3 on Windows 7.

This other problem may be related.

https://www.ads-software.com/extend/plugins/wpsearch/