Personally, I'd use the foreach code from the original question. I find it clearer and cleaner than even the "wish" code. For one thing, "@fields" doesn't have to be repeated in that code.

If grinder finds     $totals{$_} += $delta{$_} foreach( @fields ); "ugly", then I doubt

    use mapcar;
    mapcar { $_[0] += $_[1] } [@totals{@fields}], [@delta{@fields}];
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would fair any better.

        - tye (but my friends call me "Tye")