If you know if advance you need distinct elements, use a set instead of `list.distinct()`.

# announcements

[karelpeeters]

If you know if advance you need distinct elements, use a set instead of list.distinct().

[warriorprincess]

Gotcha! Could that be causing the issues of memory?

[Andreas Sinz]

@warriorprincess what do you call large inputs?

[warriorprincess]

@Andreas Sinz this: https://codeshare.io/5ov7EX

[warriorprincess]

it works okay on my pc

[warriorprincess]

but the cloud portal says

[warriorprincess]

out of memory

[Andreas Sinz]

how many integers are inside nums?

[karelpeeters]

Could be the "cause" depending on how many duplicates there are.

[warriorprincess]

theyre all zeros...

[karelpeeters]

They a set will use O(1) memory while the list would use O(n) memory and have way worse performance.

[warriorprincess]

@Andreas Sinz a lot of them...100ish

[warriorprincess]

1000*

[warriorprincess]

@karelpeeters makes sense

[karelpeeters]

That's a relatively small amount 😉

[warriorprincess]

i guess my code sucked and was giving duplicate

[warriorprincess]

thats why i had to use distinct

[warriorprincess]

which messed up the perf...

[warriorprincess]

i tried to reduce the duplicates and reduced them to one