Bottleneck
A bottleneck refers to a constraint in a system that limits its overall performance or capacity. This constraint can be found in various contexts, from computer systems and manufacturing processes to supply chains and even biological populations. Essentially, a bottleneck occurs when a specific part of a system slows down or restricts the flow of the entire system.
Via: Writing Code Was Never The Bottleneck https://ordep.dev/posts/writing-code-was-never-the-bottleneck