LuaJIT

# Status

This documentation is for LuaJIT 2.1.0-beta3. Please check the `doc` directory in each git branch for the version-specific documentation.

The currently developed branches are LuaJIT 2.1 and LuaJIT 2.0.

LuaJIT 2.0 is in feature-freeze — new features will only be added to LuaJIT 2.1.

## Current Status

LuaJIT ought to run all Lua 5.1-compatible source code just fine. It's considered a serious bug if the VM crashes or produces unexpected results — please report this.

Known incompatibilities and issues in LuaJIT 2.0:

- There are some differences in implementation-defined behavior. These either have a good reason, are arbitrary design choices or are due to quirks in the VM. The latter cases may get fixed if a demonstrable need is shown.
- The Lua debug API is missing a couple of features (return hooks for non-Lua functions) and shows slightly different behavior in LuaJIT (no per-coroutine hooks, no tail call counting).

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