RS.CLIPPY.ITER_COUNT

Replace `.iter().count()` with `.len()`

This checker is a Clippy lint created by The Rust Project Contributors. The documentation shown here is a copy of the original documentation for: iter_count. Copyright ©2025 The Rust Team. All rights reserved.

What it does

Checks for the use of .iter().count().

Why is this bad?

.len() is more efficient and more readable.

Example

let some_vec = vec![0, 1, 2, 3];

some_vec.iter().count();
&some_vec[..].iter().count();

Use instead:

let some_vec = vec![0, 1, 2, 3];

some_vec.len();
&some_vec[..].len();