Thank you, Anonymous Monk! I tried-and-enjoyed your solution to include doubling the data size e.g. 32-bit count and 20 key length.

$ diff llil_judyhs1.pl llil_judyhs2.pl 
7,10c7,10
< my $DATA_TEMPLATE    = 'nZ10';
< my $DATA_SIZE        = 12;
< my $COUNT_SIZE_BYTES = 2;
< my $COUNT_SIZE_BITS  = 16;
---
> my $DATA_TEMPLATE    = 'NZ20';
> my $DATA_SIZE        = 24;
> my $COUNT_SIZE_BYTES = 4;
> my $COUNT_SIZE_BITS  = 32;

[download]
$ time perl llil_judyhs1.pl big1.txt big2.txt big3.txt >out1.txt
my_test start
get_properties : 10 secs
sort + output  : 5 secs
total          : 15 secs
353468 Kbytes of RAM were used

real  0m14.770s
user  0m14.669s
sys   0m0.084s

$ time perl llil_judyhs2.pl big1.txt big2.txt big3.txt >out2.txt
my_test start
get_properties : 10 secs
sort + output  : 5 secs
total          : 15 secs
473784 Kbytes of RAM were used

real  0m15.073s
user  0m14.938s
sys   0m0.119s

[download]

In reply to Re^3: Rosetta Code: Long List is Long by marioroy
in thread Rosetta Code: Long List is Long by eyepopslikeamosquito

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