Search

http://diznix.com/dizwell/archives/153 Full Text Search benchmark, Oracle vs Postgres, on 2x Quad core Xeon, 8G RAM, 2 SSDs x RAID 1. Pg is being slightly faster when query contains several words, once word count increases, oracle leaps ahead (suggesting a more mature FTS implementation)

http://zooie.wordpress.com/2009/07/06/a-comparison-of-open-source-search-engines-and-indexing-twitter/ this is not a strict benchmark, but rather a broad review. Results should be taken as a starting point in research, not as benchmark results.

http://re.search.wikia.com/ Search Engine from Wikipedia, alpha