Earlier this we saw the HTC One S with its Qualcomm S4 processor break the 5000 point barrier in the Quadrant benchmarks. A little over a month later the quad-core Galaxy S III scored 5642 points in the Quadrant Benchmark. The HTC's flagship, the One X scored a respectable 4842 points, but was left in the shadow of its lower cost sibling and Samsung's new monster.
A leaked version of Sense 4.1 ROM (2.15.401.5) for the Tegra 3 version of the HTC One X ROM found its way to XDA Developers. The HTC One X with the leaked ROM scored close to 6000 on the Quadrant Benchmark test.
The new ROM is leaner and meaner. All 3-D effects were removed from the launcher to eliminate lag. There are also UI the most welcome of which is the ability to use the multitasking (recent apps) button as a menu button, which eliminates the on screen menu button which wasted a lot of screen real estate. The ROM also adds a dedicated button to the camera app which allows you switch between primary and front camera and a dedicated browser button for tab switching. WiFi signal is reportedly improved as well as better battery life.
The ROM is still based on Ice Cream Sandwich (Android 4.0.4), so more performance improvements can be expected when the Jelly Bean ROM is released.