About the LoadString in Lua

f = loadstring ("i=i+1") is basically equivalent to F = function () i=i+1 end

But the second piece of code is much faster than the first, because it is compiled only once when the corresponding program block is compiled, and the first piece of code is

Each call to LoadString is compiled, because LoadString does not involve the lexical domain each time it compiles, so the above two pieces of code are not equivalent, as follows:

i = 32

Local i = 0

f = LoadString ("i = i + 1;print (i)")

g = function () i = i + 1; Print (i) end

F ()---33

G ()---1

The function g operates the local I as expected, but F operates on the global I, because loadstring always compiles its string in the global environment.

About the LoadString in Lua