Will the interface slow down as the code grows to one hundred thousand lines?

The growth of code lines up to 100 thousand by itself does not necessarily lead to interface slowdown. Performance depends not on the volume of code, but on how it is written and how effectively algorithms and user interactions are implemented.

If the code is well-structured, optimized, and does not contain blocking operations in the main interface thread, the interface will remain responsive. However, if there are many heavy computations or synchronous operations in the UI thread in large codebases, this can lead to slowdown.

It is important to use profiling and optimization, as well as to separate logic and interface to avoid lag.