Github user zkendall commented on the pull request:
https://github.com/apache/storm/pull/1105#issuecomment-209041682
I found this as a performance update in change log. I'm curious why the new
implementation is so much better than the old?
One consideration is [bit-xor contains `reduce` inside it
already](https://github.com/clojure/clojure/blob/clojure-1.7.0/src/clj/clojure/core.clj#L1276).
So maybe removing the extra reduce in the closure would have helped without
resulting to Java alternative.
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