Wintune for Windows 3.x is WINDOWS Magazine's test and tune-up kit for analyzing and optimizing Windows. Wintune uses the same system calls to Windows that word processors, spreadsheets and databases use when they request access to hardware via Windows. The execution of these calls is timed to measure the performance of your CPU/floating-point unit (FPU), your video system (video card and monitor), your hard disk storage and your RAM. Wintune also performs applications benchmarks. WINDOWS Magazine determined the proportions of various Windows system calls used in generic word processing and spreadsheet applications. Using those proportions, they adjusted Wintune's raw system-call performance numbers and broke down the results by system component. This lets you focus attention on the parts of your system that are most responsible for slowing down your particular application. If your bottleneck is video, you don't need to spend much time tuning your hard disk, and vice versa. Once you've addressed the problems that Wintune points out, you can use an application benchmark (or run your application) to verify that your tune-up had a positive effect.