For some reason, this post from INADA Naoki shows up on the python-list
email archives, but not comp.lang.python, which is what I use.
INADA Naoki wrote at Sat May 14 10:32:12 EDT 2016:
> Mark and Sweep GC is triggered when many new **tracked** objects are
> created and not destroyed.
>
> Since integer doesn't have reference to another objects, it's not tracked
> object. So your sample code doesn't show difference of GC.
> You can see gc stats via gc.set_debug(gc.DEBUG_STATS).
Thanks for the explanation! So lists, tuples, sets etc would all be tracked?
Following the suggestion to use this code:
class Tree:
def __init__(self, n):
if n > 0:
self.a = Tree(n-1)
self.b = Tree(n-1)
self.n = n
def main():
for _ in range(10):
Tree(16)
I can see a significant difference in performance. With the gc on, running
main() on my computer takes 11.2 seconds, with the gc off, it takes 7.5
seconds.
Nice, and thank you!
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
