Profiling & Memory Optimization

Generator Memory Footprint

List comprehensions create full objects in memory immediately, whereas generator expressions yield items on demand.

Example code

import sys

list_comp = [x for x in range(10000)]
gen_exp = (x for x in range(10000))

print("List size (bytes):", sys.getsizeof(list_comp) > 1000)
print("Generator size (bytes):", sys.getsizeof(gen_exp) < 300)

Practice exercise: Generator vs List

Create a generator expression `gen = (x * 2 for x in range(5))`. Print `sum(gen)`.