0 elements were shifted 1 times
16 elements were shifted 16 times
31 elements were shifted 120 times
45 elements were shifted 560 times
58 elements were shifted 1820 times
70 elements were shifted 4368 times
81 elements were shifted 8008 times
91 elements were shifted 11440 times
100 elements were shifted 12870 times
108 elements were shifted 11440 times
115 elements were shifted 8008 times
121 elements were shifted 4368 times
126 elements were shifted 1820 times
130 elements were shifted 560 times
133 elements were shifted 120 times
135 elements were shifted 16 times
136 elements were shifted 1 times
98 elements where shifted on average

##</code><code>##

@a = qw( a b c );

+---+---+---+---+
| a | b | c | / |      / = allocated, but unused.
+---+---+---+---+

push @a, 'd';

+---+---+---+---+
| a | b | c | d |
+---+---+---+---+

push @a, 'e';

+---+---+---+---+---+---+---+---+---+---+---+---+
| a | b | c | d | e | / | / | / | / | / | / | / |
+---+---+---+---+---+---+---+---+---+---+---+---+