New CPU Usage tool in the Performance and Diagnostics hub in Visual Studio 2013

Introduces the new CPU Usage tool within the Visual Studio 2013 Update 2 Performance and Diagnostics hub. This tool provides low-overhead statistical sampling to measure CPU time spent executing C++, C#/VB, and JavaScript code. It offers detailed reports with 'Total CPU' and 'Self CPU' metrics (both percentage and milliseconds) to identify performance bottlenecks. The post demonstrates its use with a sample application, showing how to analyze CPU-intensive functions like 'BruteForceNextPrime' and how to iterate on optimizations using improved algorithms and parallelization, measuring the impact on both elapsed time and CPU time.