Metal

is_available()	Check if the Metal back-end is available.
get_active_memory()	Get the actively used memory in bytes.
get_peak_memory()	Get the peak amount of used memory in bytes.
get_cache_memory()	Get the cache size in bytes.
set_memory_limit(limit, *[, relaxed])	Set the memory limit.
set_cache_limit(limit)	Set the free cache limit.