Intel Core Ultra 9 285K "Arrow Lake" Performance On Linux Has Improved A Lot Since Launch
Right away there was almost a night and day difference in performance with the web browser (Mozilla Firefox) benchmarks up first. The current performance now was significantly better than at launch... Huge difference. But as you can see, so is the power consumption. This big improvement in performance comes down to the Linux kernel scheduler behaving better and now on Ubuntu 25.04, the web browser is ending up on the P cores rather than lower-power E cores. Great for enhancing the web browser performance but with increased power consumption.
The newest software stack was also leading to slightly better compile times for code compilation across all 24 cores. Also very exciting was seeing lower power consumption while compiling on the April 2025 software stack than at launch.
Compiling other codebases like the Godot game engine was also showing slightly better build times and at lower power use. The Godot CPU power consumption numbers are interesting and show a clear trend of lower CPU power use of the Core Ultra 9 285K during the final stage of the build process. It would appear during the linking phase of the build process that the Core Ultra 9 285K is consuming much less power than before.