The table tells us that the "copy" was able to run 171189 times per second, while the "ref 1" was able to run 5073751 times per second, i.e. 29 times faster.

Note that in practice, if you need to access each element of the array, repeated dereferencing can be slower than accessing the elements directly.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: A matter of sub pass by reference or copy by choroba
in thread A matter of sub pass by reference or copy by h2

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