does this also explain why using a normal @array variable is faster than a constant list?
No. That's because constant arrays are implemented as constant array refs. So 
use constant foo qw(a b c);
@a = $h{foo()}

[download]
is implemented roughly as 
use constant foo [qw(a b c)];
@a = $h{@{foo()}}

[download]
And neither (as far as I'm aware) get the compile-time HEK treatment

Dave.

In reply to Re^3: Benchmark: Constant List in Hash Slice by dave_the_m
in thread Benchmark: Constant List in Hash Slice by LanX

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