As you can easily imagine, poorly written code is sometimes clearly visible at first glance. Making loops with repeated access to the database or reading plenty of data while using only a minute part of it is something that a mature developer avoids intuitively. However, sometimes, the performance bottlenecks and memory management issues are not that obvious.
In complex, multi-level transactions, with various events, nested calls, and tens of screens and subroutines, it is nearly impossible to point out the root cause of performance problems by simply looking at the code or debugging the code step by step. Moreover, when the code is developed by someone else and the logic is not clearly documented, it may turn out that the issue is in a completely different part of the program.
The process of analyzing the program flow, without tedious...
