Performance proposal

Hi. Thank you for this cool plugin!
I have a some proposal for increasing plugin performance.
It makes many calls for checking product’s stock state in loop. So it’s takes some excess time. We can call one query to get all bundle’s products and save them in variable. Like a cache on runtime.

I implement this feature. This is a raw code and need testing:

By my measurements it’s work faster more than 50% of execution time.
Thanks.