Performance Testing

While optimising software, functionality and usability are often the main focus.
There are other non-functional requirements such as performance and stability are often ignored.
Website or app loading times need to be as short as possible and when it comes to minimizing the frustration and disappointment of users.
Unfortunately, even when software has been successfully tested in a laboratory environment for load and reaction times, various issues still remain unaddressed, such as: How does the system perform under real-life conditions or when using different network providers? What happens if thousands of users want to access the software simultaneously? we would be using our crowd to generate load.