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Out of interest, which one removes the 2 GB limit? That was a reason I used the standard lua a while ago.

There is no 2GB limit if LuaJIT built in GC64 mode. It was an opt-in build time option until 13 days ago now its on default for 64 bit builds https://github.com/LuaJIT/LuaJIT/commit/bd00094c3b50e193fb32...

There's a patch for LuaJIT that increases the limit. It comes pre-applied with the LuaJIT that installs with openresty. https://github.com/openresty/lua-nginx-module/issues/1019