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I'm using Lua in my C++ program, as an library. But I read that LuaJIT is a better implementation.

Is it posible to replace with LuaJIT with little change? How?

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Just replace the source files if you're compiling from source, or the DLL if you're using the precompiled one. LuaJIT is meant to be a drop-in replacement for stock lua, so it should work just by replacing it. – Panda Pajama Feb 19 at 9:31
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@PandaPajama that should probably be an answer, not a comment – ashes999 Feb 19 at 11:44
It's not so simple on Mac OS X – finnw Feb 19 at 15:27
Here's a relevant email discussion about the pros/cons of various Lua implementations. – Anko Feb 20 at 10:34

2 Answers

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Just replace the source files if you're compiling from source, or the DLL if you're using the precompiled one (preferred).

Per the Installation Guide:

LuaJIT is API-compatible with Lua 5.1. If you've already embedded Lua into your application, you probably don't need to do anything to switch to LuaJIT, except link with a different library:

LuaJIT is meant to be a drop-in replacement for stock lua, so it should work just by replacing it

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up vote 1 down vote

As Panda Pajama comment suggest. It's easy a drop-in replacement.

  • Change include path to get LuaJIT lua.hpp file
  • Downgrade code from Lua 5.2 API to Lua 5.1 API.
  • Linked with LuaJIT library instead of lua library

The worst part was the downgrade to 5.1, specially the load of own function modules in lua State.

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