Comment by gorjusborg

Comment by gorjusborg 16 hours ago

You may want to benchmark lua versus luajit if you are writing scripts or other short-lived programs.

JIT-compiled languages aren't generally faster in starting up, they generally are used to speed up long-lived programs that have hot sections.

haberman 16 hours ago

LuaJIT bucks the trend of slow-warmup JITs. It is extremely quick to compile and load, and its interpreter is very fast -- faster than the JIT-compiled code from LuaJIT v1 IIRC, and certainly faster than the interpreter of Lua.

It wasn't until LuaJIT that I realized that JIT didn't inherently have to be these slow lumbering beasts that take hundreds of milliseconds just to wake from their slumber.

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gorjusborg 16 hours ago

Yet I've witnessed Lua 5.1 launching faster than luajit for some of my use cases.
My point still stands though. Don't just use LuaJIT thinking it will magically make things faster in all cases. If you are embedding, LuaJIT is a no-brainer. If you are using a stand-alone interpreter, measure if you care about reality.

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- NuclearPM 12 hours ago
  
  > If you are embedding, LuaJIT is a no-brainer. If you are using a stand-alone interpreter, measure if you care about reality.
  This seems backwards. Lua is easier to embed and luajit is just as easy to install standalone and has zero downsides.
  
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