LuaProfiler

LuaProfiler is a time profiler designed to help finding bottlenecks on
your Lua program. If you use LuaProfiler into your program, it will
generate a log of all your function calls and their respective running
times. You can use this log to generate a summary of the functions your
program uses, along with how long it stayed in each of them, or you can
import the log into a spreadsheet for further analysis.