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## SQLite Release 3.6.14 On 2009-05-07

- 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 and a chronology are both also available. A detailed history of every check-in is available at SQLite version control site.