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in reply to Re: Bug when undefining a large hash
in thread Bug when undefining a large hash

Thanks for the code, I used it to benchmark Perl 5.10.0 on Linux:
s/iter With undef Without undef With undef 17.2 -- -26% Without undef 12.8 34% --
which, although a bigger difference than yours, isn't as bad as what oxone reported. This was on:
Linux 2.6.25 #6 SMP Tue Aug 5 17:42:15 SGT 2008 i686 GNU/Linux This is perl, v5.10.0 built for i486-linux-gnu-thread-multi