Expert evaluation of the app for analyzing memory leaks and GDI resource usage

Our client provides its own software solution for pharmacies – a system for the primary management of a work process in independent pharmacies and pharmacy chains. After the migration of the app from Delphi 2007 to Delphi 10.3, there appeared some issues during its intensive usage. Amid user interaction with the app, GDI resources utilized by the software achieve the maximum level of 10000 GDI resources for a process. As a result, the app can’t create additional management elements and it crashes with different error reports. The app can increase the GDI limit up to 65K but it can only postpone the moment of app crash but won’t solve the problem.

The problem doesn’t appear in the Delphi 2007 app version though the code in many parts of both versions is identical. After the migration to Delphi 10.3 one of the key updates was the transformation of String into AnsiString in those places where it was required. It was the most serious change. Another important update was the replacement of some components with their Unicode version.

The client turned to us with a request to conduct the evaluation of the existing code and provide recommendations on the ways to enhance the app and solve the problems.