Closes https://github.com/flutter/flutter/issues/119920

### The difference with the speed issue template

- Issue's main description
- DevTools stats observation section

### Demo

- Demo issue template: [My app has some non-speed performance issues](https://github.com/huycozy/flutter/issues/new?assignees=&labels=from%3A+performance+template&projects=&template=4_performance_others.yml)
- Demo a filed issue: https://github.com/huycozy/flutter/issues/7