[le-mark]

Did sandboxing factor into the equation? My understanding is lua scripts in redis aren't sandboxed, other than the (possibly?) restricted api. But one could limit heap with a custom allocator for example, and cpu cycles with a hook, if desired.

[bch]

I think that wouldn’t be an argument for Lua over Tcl, as Tcl has facilities built especially for this type of environment:

Safe Interpreters[0] and resource constraints[1] come to mind.

[0] https://wiki.tcl.tk/4204

[1] https://www.tcl.tk/man/tcl/TclCmd/interp.htm#M47