This "exporting" is a copy. Copies take memory.

Actually, it only copies a reference, not a lot of memory 

perl -MConfig -le " print \%Config::Config; print \%Config; "
HASH(0x99abe4)
HASH(0x99abe4)

[download]

In reply to Re^2: Config::Config{osname} and Config{osname} by Anonymous Monk
in thread Config::Config{osname} and Config{osname} by PhillipHuang

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