Hi, list. I read about this:

https://www.mail-archive.com/ntg-context@ntg.nl/msg60217.html

But I want to know how to pass data to the .tuc file directly from Lua. I
think about some complex strings are calculations which are done in each
pass and slow down the whole compilation process. Something like:

local function factorial(n)
if in_tuc then -- whatever in_tuc means
   return factorials[n]
else
   ...
   factorials[n] = ...
   return ...
end
end

Is that feasible? Should I use the CLD versions of the TeX macros instead?

Best regards,

Jairo