It’s sad… As a rule my score is 20-30 fps for HTML version. I know how to optimize lots of code here. Sadly I’m not planning to do this for now =(
Do not worry too much about that--My playing system is a dinosaur. 2GHz dual core CPU (hyper-threading/fake cores disabled) and only 4GiB RAM. Newer/more modern systems will probably handle your "game" with ease. :-)