What is the performance of enumeration in Python?

What is the performance of enumeration in Python?

Enumeration in Python, using the enumerate() function, is generally efficient for iterating over sequences. It provides both the index and the value, which can be handy.

How does it compare to using a for loop with range?

Using enumerate() is often more Pythonic and can be more readable than using a for loop with range(). However, performance-wise, they are quite similar for most use cases.

Are there any performance benchmarks available?

Yes, benchmarks show that enumerate() is slightly faster than using range() with indexing, especially for larger lists. However, the difference is usually negligible.

What about memory usage?

enumerate() is memory efficient as it generates indices on-the-fly without creating a separate list, unlike range() which creates a list in Python 2.