Guldan hps ranking vs analyze

I came to notice that sometimes there is a slight difference between the hps values from the on given in the analyze tab vs the ranking tab.
Here you can see an example for my last Guldan kill:

In analyze i did 499k hps, while in ranking it was 482k hps. I saw the same behavior in the other Guldan logs i checked.

See the note at the top of the Rankings tab. The extra action button healing is excluded from rankings.