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## SQLite Release 3.5.2 On 2007-11-05

- Dropped support for the SQLITE_OMIT_MEMORY_ALLOCATION compile-time option.
- Always open files using FILE_FLAG_RANDOM_ACCESS under Windows.
- The 3rd parameter of the built-in SUBSTR() function is now optional.
- Bug fix: do not invoke the authorizer when reparsing the schema after a schema change.
- Added the experimental malloc-free memory allocator in mem3.c.
- Virtual machine stores 64-bit integer and floating point constants in binary instead of text for a performance boost.
- Fix a race condition in test_async.c.
- Added the ".timer" command to the CLI

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.