Rich Hickey's slides from jvm lang summit - worth a read?

[bearophile]

Walter Bright:

>I've been thinking of transitioning dmd's semantic analysis to using immutable data structures because it will reduce allocations, not increase them.<

As usual I am ignorant about such matters, so I can't give you a good answer.
But from what I've seen in immutable-based languages, they produce a sustained flux of small/little immutable objects that the GC has to free and allocate all the time. This stresses the GC. Surely people here that know Clojure or Scala, Haskell or F# may give you a better answer. Maybe even numbers of the amount of object flux they face in normal programs. So the situation with strings may be not generalizable to the other immutable data structures a program may need to use.

Bye,
bearophile