hz-simpleperf-debug

From README

Simpleperf Debug Skill When to Use Use this skill when you need hardware-level CPU performance insights on Meta VR devices: Classifying whether an app is CPU-bound, memory-bound, or I/O-bound Finding CPU hotspot functions consuming the most cycles Measuring kernel vs userspace CPU overhead per thread Identifying cache-thrashing or branch-prediction issues Supplementing Perfetto trace analysis with hardware PMU counter data This skill complements hz-perfetto-debug. Perfetto shows what your app is doing over time. Simpleperf shows where the CPU is spending hardware cycles — cache misses, branch mispredictions, and instruction throughput that Perfetto can't see. VR Performance Context Meta VR devices run on mobile ARM SoCs with strict thermal and power budgets.