Single reference copy
Execution time: 0.0
Memory chunks: 140558259798656 140558259798656
Same memory chunk? True

Shallow copy
Execution time: 0.005
Memory chunks: 140558259798656 140558259799232
Same memory chunk? False

Deep copy
Execution time: 1.994
Memory chunks: 140558259798656 140558259802752
Same memory chunk? False