We all know how useful floating apps can be, so an always-on-top performance monitor makes perfect sense for power users and developers. One such project just hit the Play Store from developer Chainfire, who has already brought us several other useful tools, like CFBench, SuperSU, and FAAPT.
Simply called Perfmon, this is a floating application that can output certain metrics for monitoring purposes: foreground app, CPU, disk I/O, and network I/O. What makes this app unique, however is its CPU metric called CPU capacity usage. According to Chainfire, it "will take the CPU usage and scale it to what it would be if all cores were running at full capacity."