Roblox Lua runs over C++ which is why it is a bit slower than other programming languages. It’s like taking a path to several places, you start at home, then school, then back home. Roblox Lua gets compiled in C++ then the result is given back to us in Lua.
Unrelated:
Please add more content to your post. It does not follow the format for posting in this category. This would probably go in #discussion rather than scripting support as you are not seeking help with your code. Please read this post