We offer an app to thousands of restaurants throughout the world. We have a robust QA department that does regression and performance testing in a very scientific manner. We ordered 2 of these devices in order to evaluate performance improvements in order to decide if this new gen 9 model would be a budget device that we could recommend to customers. We have large number of kindle devices on-hand and tested it thoroughly against the previous generation of the Fire HD 10 (gen 8). In our tests we held all other variables constant (close other applications, use the exact same amazon account for sign in, etc.). We hoped to see something similar to the 30% faster performance advertised. Unfortunately, the newer generation devices performed consistently slower than the previous generation, despite the new "faster" processor. We can only speculate why this is the case. Our best conjecture is that the OS upgrade might be heavier or not playing nice with the new hardware? Either way, this is a significant performance regression over the previous model.