There seems to be a typo in the 4th paragraph (directly under the struct memory table). I'm counting a padding of 7 bytes. 96 (size of struct) - 89 (size of primitive types) = 7. The first padding consist of 3 bytes to correctly align the 4 byte int after a 1 byte bool. Second padding is 2 bytes due to a 4 bytes int following two 1 byte bools and third padding is 2 bytes as described in the blog, 3+2+2=7 bytes of padding.