Github user srowen commented on the issue:
    @jlhitt mentioned looking into the actual performance difference. If it's 
worse, it's easy to modify this new path to only affect aligned architectures. 
    My guess, and this is just based on reading about the empirical effect on 
aligned access on x86, is that it would be virtually no faster. suggests it used 
to make a difference; 
suggests it probably doesn't now.
    The cost of actually evaluating this branch however is also virtually 
nothing. This isn't the expensive part of this method by far. That's why I say 
I'm not even thinking this depends on avoiding the branch. Probably a wash, 
maybe a virtually undetectable win. It's worth a test. I liked the idea of 
unifying more of the two code paths.

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