Optimize PyQt5 App and Flow Sensor Integration

I'm looking for a skilled developer who can: - Enhance the performance of my PyQt5 application, with a focus on optimizing its speed and memory usage. - Write code for handling multiple interrupt flow sensor readings. The goal is to ensure accurate dispensing of 20 liters. Please note, while the UI of the app is not the primary concern, a keen eye for performance-related improvements is crucial. The current application faces performance issues related to not dispensing exact 20liters for multiple taps using Arduino and delay in api call that need to be addressed.