C++ Static vs Dynamic Libraries Explained

The difference between static and dynamic libraries lies in the way they are linked during compile time.

1. Static libraries are linked to the executable file during the compilation phase, which means the executable file will contain all the code and data from the static library, resulting in a larger file size.
2. Dynamic libraries are not linked to the executable file during compilation, instead they are loaded dynamically at runtime, which means the executable file only includes references to the dynamic library, resulting in a relatively smaller size.

The usage of static libraries and dynamic libraries also differs.

1. Static libraries are linked to the executable file during compilation, so there is no need for external library files during program execution, making it easier for deployment and distribution.
2. Dynamic libraries are loaded into a program at runtime, allowing them to be shared between different programs and reducing memory usage and disk space.

Static libraries offer better performance during program execution because all code and data are compiled into the executable file, avoiding the overhead of dynamic loading and parsing. On the other hand, dynamic libraries have the advantage of reducing the size of the executable file, making it easier to update and maintain.

In general, static libraries are more suitable for small applications or standalone tools, while dynamic libraries are more appropriate for large applications or environments requiring shared libraries.