Test the CPU Performance of Your Windows 8/RT Device
Although the spec sheet of your Windows 8 or RT device may give a pretty big indication of its performance, it’s sometimes a lot more helpful if you have an idea of how well it performs in real life. But although there are plenty of software tools available to help you to do this, we thought that XDA members may be much more inclined to try something home-grown and open-source. This is where CPU Performance Tester comes in.
Developed by XDA Senior Member rootfan, CPU Performance Tester performs a large number of mathematical operations on your Windows 8 or RT device in order to see how well its CPU performs. Depending on your device’s CPU, it uses up to 8 threads to do this, and measures the amount of time it takes to finish the test. This provides a simple and easy way of comparing the CPU performance of your device versus other devices that have gone through the same test. One great thing about CPU Performance Tester is that it is also open-source, so you can incorporate your own tests and measurements if you want.
If you are interested in giving this a go, be sure to check out the original thread for more information.