Python - Sum of Intervals | Codewars 4KYU

4KYU Codewars Problem

[yevhenliubarskyi]

A very nice and short solution! Good job.

[pshiro]

I'm testing this kata, but now this kata has large tests and my code can't complete it because it takes more than 12 seconds. And I check your code in this kata, and it doesn't work either.
P.S. My code:
return len(set({i for a, b in intervals for i in range(a, b)}))

[АлексейНикитин-щл]

Hey bro! It won't pass the execution time (12000 ms) for large numbers. Something like [(0, 20), 10), (30, 40)]

[Vityk.W]

It don`t work for long intervals like this
[(0, 25), 15), (52, 62)] # result is
.... out of memory ((

[lepuzki]

I made similar code but im trying to think of a better algorithm, its just too slow lol