Are there services in the network to evaluate the level of processor load from the content of web pages?

Question

Performance evaluation

Yesterday I completed an animated banner in html5 for the main page of my store. I have never done a sauna in such a very frisky dynamic. Everything changes briskly, several scenes, a lot of elements, both vector and raster, in a variety of transformations. A computer that serves as a kind of "Procrustean bed" for me to assess the severity of animation - an old office (but pumped to the limit) MBP middle 2010 still on CoreDuo 2 after a few cycles of viewing in "safari" confidently starts to make noise with all its fans, which is usually not from him wait. A little later, and "safari" gives a warning that it is better to close the page, because. consumes a lot of resources. This was not the case before - the feature appeared a couple of macOS updates ago.
Don't care about the site, it's mine and no one prevents me from posting commercially necessary materials. But now I need to make a bunch of animated banners for adwords/mytarget/yandex.direct in the same style. And there it is clear in the requirements for advertising materials that banners should load the system at a minimum level. An example from the directive is at the very bottom.
That's actually the essence of the question:
Are there any web services on the network that could give estimated measurements of the load of typical CPUs from the content of web pages?

Answer 1

What's wrong with developer tools? There you can throttle the processor if you want to see how it will work on weaker machines.