Thanks, good to see a new perf tool (and not just another procfs top clone :-). I've started using processor trace in the cloud, thanks to bare-metal instances, but for years I couldn't touch it (not available in VMs). There's a wealth of new information it provides, and we need better tooling on top of it, like magic-trace.

Glad to see "overhead" mentioned and quantified. I'd put the 2-10% at the top though, as that's heavy handed for some environments (can trigger a production fail-over).

I see magic-trace has implemented what some call "flame charts" (time on the x-axis) and not "flame graphs" (alphabet on the x-axis). The best tools do both (e.g., TraceCompass). Please do both! Will make seeing the big picture easy (flame graphs) and then zooming into time-based patterns easy too (flame charts).