Okay, so that begs a question - what is the impact on performance between:

irrelevant :)

Throwing memory at the problem (extra $scalar) is slightly faster than extra (double-1) hash lookups

But you meant to type 

$someKey = $resultHash{SomeKey};
$totalsHash{ $someKey } = $$someKey{AltValue};

[download]

In reply to Re^3: $var{el} += 1 vs $var{el} = $var{el} + 1 (Benchmark) by Anonymous Monk
in thread $var{el} += 1 vs $var{el} = $var{el} + 1 by banesong

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