SQLite Release 3.6.14 On 2009 May 7 (3.6.14)

• Added the optional asynchronous VFS module.
• Enhanced the query optimizer so that virtual tables are able to make use of OR and IN operators in the WHERE clause.
• Speed improvements in the btree and pager layers.
• Added the SQLITE_HAVE_ISNAN compile-time option which will cause the isnan() function from the standard math library to be used instead of SQLite's own home-brew NaN checker.
• Countless minor bug fixes, documentation improvements, new and improved test cases, and code simplifications and cleanups.

A complete list of SQLite releases in a single page is also available. A detailed history of every check-in is available at http://www.sqlite.org/src/timeline.