We've known this for some time over here in the ClojureScript corner of the world - all of our collections are immutable and modeled directly on the original Clojure versions written in Java. Modern JavaScript engines have now been tuned to the point that it's no longer uncommon to see collection performance within 2.5X of the Java Virtual Machine.
Wait, wait, wait. What does the performance of persistent data structures have to do with the future of JavaScript MVCs?
Wait, wait, wait. What does the performance of persistent data structures have to do with the future of JavaScript MVCs?
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