On Wednesday, November 16, 2016 at 8:10:27 AM UTC-6, Jason Felice wrote:
>
> I'll bet the atom accesses dominate the computation.  They are a part of 
> Clojures software transactional memory (STM) and have a cost.
>

Atoms don't use the STM and if used in a single-threaded context like this, 
they will be uncontended, so the fastest case. That said, if you want 
something stateful, a volatile is faster in a single-threaded context.

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