At the moment, the description for os.difftime (on this page) reads like this:
The link for the
time_t type links directly to a C++ reference.
While this description is certainly informative, it’s not particularly relevant to Roblox developers. It should probably just say that it returns t2-t1. This is (more or less) what it says in the function’s entry in the official Lua 5.1 manual:
