Wanted: lua profiler

[Daurnimator <quae@...>]

Thought I'd try something new and post to the mailing list looking for
existing solutions instead of writing one myself :)
I'd like to profile a mixed lua+C program/library.
What tools/solutions are out there? (a cursory search shows a few
solutions for lua 5.0 or 5.1, but these projects no longer work with
5.2/5.3)
How do people find out where the hot spots are in their lua programs?

The flamegraph tool comes with things for many languages (java,
node.js, etc: http://www.brendangregg.com/flamegraphs.html#Updates )
I know of agentzh's flamegraphs for luajit/openresty (
https://github.com/openresty/stapxx/blob/master/tapset/luajit.sxx )
Does someone have one of these for plain PUC lua?