How I fixed a QTimer delay bug in Qt by separating EventLoop with Executor Pattern

I was debugging a subtle timing issue in a Qt project where QTimer callbacks were delayed unpredictably. Cause : Task objects weredoubling as Executor , all running on the main EventLoop. When other async Slots fired at the wrong moment, so execution was delayed. How to Fix : Executor Design Pattern + Thread separation - Separate Task from Executor (Executor