Am Fr., 15. Aug. 2025 um 20:53 Uhr schrieb Marc Nieper-Wißkirchen <marc.nie...@gmail.com>:
[...] > > Yes, if the pair is younger than the car or cdr, every move of the car > or cdr after the pair creation will mean that the GC notifies the > transport cell guardian about the pair. > > If the car or cdr is modified so that it becomes younger than the > pair, a generational GC will have to move the pair into the younger > generation (because it has to update it when the car or cdr moves). > This is one reason why mutation is costly. This handling is > independent of SRFI 254, but it guarantees that the pair will never be > older than its contents. Correction (which doesn't change the point): The car or cdr must be moved into the older generation, not the pair into the younger generation (because even older things may point to the pair). [...] Marc
