potential memory leak?

[hanying33]

I noticed this package is using a lot of memory, I didn't deep dive on the source code.
@leftstick Do you think if there's any room for improvement? Like unsubscribe the listeners/subscription on destroy.

[leftstick]

@hanying33 that's possible. Feel free to give me your PR or any findings.
I will leave this issue open in case we might have further discussion