kragen@thrifty:~/devel$ ./hashsize.pl
zero hashes:
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
kragen   31633  0.0  1.7   9680  6580 pts/6    S+   23:50   0:00  |       \_ /usr/bin/perl -w ./hashsize.pl
kragen   31634  0.0  0.3   4132  1388 pts/6    S+   23:50   0:00  |           \_ sh -c ps fauxw | egrep 'PID|./hashsize.pl'
kragen   31636  0.0  0.1   2848   692 pts/6    S+   23:50   0:00  |               \_ grep -E PID|./hashsize.pl
ten thousand pseudohashes with 20 items each:
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
kragen   31633 23.0  2.5  13016  9920 pts/6    S+   23:50   0:00  |       \_ /usr/bin/perl -w ./hashsize.pl
kragen   31637  0.0  0.3   4132  1388 pts/6    S+   23:50   0:00  |           \_ sh -c ps fauxw | egrep 'PID|./hashsize.pl'
kragen   31639  0.0  0.1   3572   736 pts/6    R+   23:50   0:00  |               \_ /bin/sh /bin/egrep PID|./hashsize.pl
a hundred thousand empty hashes:
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
kragen   31633 63.0  5.1  23076 19968 pts/6    S+   23:50   0:00  |       \_ /usr/bin/perl -w ./hashsize.pl
kragen   31640  0.0  0.3   4128  1384 pts/6    S+   23:50   0:00  |           \_ sh -c ps fauxw | egrep 'PID|./hashsize.pl'
kragen   31642  0.0  0.1   2848   692 pts/6    S+   23:50   0:00  |               \_ grep -E PID|./hashsize.pl
ten thousand hashes with 20 items each:
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
kragen   31633 58.3  9.2  38888 35788 pts/6    S+   23:50   0:01  |       \_ /usr/bin/perl -w ./hashsize.pl
kragen   31643  0.0  0.3   4128  1384 pts/6    S+   23:50   0:00  |           \_ sh -c ps fauxw | egrep 'PID|./hashsize.pl'
kragen   31645  0.0  0.1   2848   692 pts/6    S+   23:50   0:00  |               \_ grep -E PID|./hashsize.pl
20 hashes with ten thousand items each:
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
kragen   31633 77.7  9.6  40368 37244 pts/6    S+   23:50   0:03  |       \_ /usr/bin/perl -w ./hashsize.pl
kragen   31646  0.0  0.3   4132  1388 pts/6    S+   23:50   0:00  |           \_ sh -c ps fauxw | egrep 'PID|./hashsize.pl'
kragen   31648  0.0  0.0   1608   168 pts/6    R+   23:50   0:00  |               \_ grep -E PID|./hashsize.pl