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  1. or download this
    $ grep  "mymalloc='y'" hints/*
hints/hpux.sh:    $undef|false|[nN]*) usemymalloc='y' ;;
...
hints/unicosmk.sh:'') usemymalloc='y'
hints/unicos.sh:    # usemymalloc='y'
hints/utekv.sh:usemymalloc='y'
  2. or download this
    use strict;
use warnings;
...

undef $content;
system "ps vp $$";
  3. or download this
    $ dd if=/dev/zero of=zero.dat bs=8192 count=131072
131072+0 records in
...
 3792 pts/1    S+     0:01      0  1354 1067505 1050812 25.9 /opt/perl
+/5.10.1/bin/perl slurp_file.pl zero.dat
  PID TTY      STAT   TIME  MAJFL   TRS   DRS   RSS %MEM COMMAND
 3792 pts/1    S+     0:01      0  1354 1067505 1050820 25.9 /opt/perl
+/5.10.1/bin/perl slurp_file.pl zero.dat