What does having “Scalable Code“ mean?

Scalable code is code that can be easily adapted to handle increased workloads or larger amounts of data without a significant decrease in performance. In other words, scalable code is able to "scale" to meet the changing needs of a system or application.

Scalable code is important in situations where the amount of data or the number of users of a system or application is expected to grow over time. For example, a web application that is designed to handle a small number of users may become slow or unresponsive if it receives a sudden increase in traffic.

To make code scalable, developers need to consider factors such as performance, efficiency, and maintainability. For example, they can use algorithms and data structures that have good time and space complexity, and avoid using costly operations or data structures that may become impractical as the workload increases.

Additionally, scalable code should be modular and well-structured, with clear separation of concerns and well-defined interfaces between components. This makes it easier to modify and extend the code as the requirements of the system or application change.

In summary, scalable code is code that is designed to handle increased workloads or larger amounts of data without significant performance degradation. It is efficient, modular, and well-structured, and can be easily adapted to changing requirements.