Question about the major gc

[重归混沌 <findstrx@...>]

Hello.

I'm learning Lua's generational GC recently.

It seems that:

After a enought amount of `youngcollection`, Lua will execute the `fullgen`.

If there is a huge amount of OLD object, the `fullgen` will make the STW
for a long while.


I'm curious why not switch to incremental mode instead of executing
`fullgen`.


Please forgive me if I have any mistakes.