This looks really nice but I'd like to see a more complex example with several complex functions and updating at least 500 fields at the same time.
Then we see how fast it is...
in case of complex functions / many fields it is more logical to use a database and BI tool that displays/visualizes data from this database as a report.
If the tool has limitation it should say somewhere, before someone spends time building a complex example and finds out it crashes the browser.