Clojure's immutable/lazy sequence abstraction involves some closures, it does not compile directly to e.g. array looping. I believe the JS VM also is tuned for

Clojure's immutable/lazy sequence abstraction involves some closures, it does not compile directly to e.g. array looping. I believe the JS VM also is tuned for imperative programming. I'm not sure how much it matters given most people are paying for a virtual dom & diffing, over querying, over-rendering, etc.