Xiaomi may have taken its time in delivering Android 10 to the Pocophone F1, but the OS upgrade apparently brings more than just minor changes to the device. Some people are even claiming that the update brings drastically improved gaming performance, which would be a boon for the almost eighteen-month-old handset.
https://www.notebookcheck.net/Android-10-update-doubles-gaming-performance-for-the-Pocophone-F1.451260.0.html
Yes there's a huge jump in the performance index with the game driver option. The option is available as it was a feature being tested by the Pixel 3 And 3XL, and this ROM is a port from the PIXEL3 series as it has the same SoC [processor] i.e SD845 with the adreno GPU
Also with liquid cooling on the Pocophone F1 the heating is highly reduced and better performance is achieved