"this method consumes significantly less memory and works faster"

[FredM67]

Well, the first is true but the second is false.
I've tested it, it's way slower than an optimized sliding average with one or more array.

On a reasonable amount of data, this method is around twice slower than what I've implemented !

[nomakewan]

Considering you have opened an issue, perhaps you could show your implementation so that it can be compared against this library's implementation?

In addition, since it is now clear this library was tested on an ESP8266, is it possible that on an ESP8266 this statement is in fact true, even though on an AVR it may not be?