in reply to Re^2: Bidirectional lookup algorithm? (Updated: further info.)
in thread Bidirectional lookup algorithm? (Updated: further info.)

Right you are. 

qwurx [shmem] ~/comp/perl/tmp > perl -le '@a = 2**64; for(1..29){$a[2*
+*$_]=$_}print `ps -o vsz= -p $$`'
Out of memory!

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Having 8 GB RAM. 2**28 doesn't die.

perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'

In Section Seekers of Perl Wisdom