Profiling
Inspector
Hover any bar to open the span details. This panel tells you what the function is, where it comes from, and how its time is spent. “Self time” is the time in the function body only. “Total time” includes its children. The bars break each into instructions, cache, and memory so you can see what is actually limiting progress.
Color modes
By Origin
Colors by code origin: User, Library, System, or Unknown. Useful to separate your code from dependencies and the kernel.
Differential
Compares Base vs Head and colors spans by change: slower, faster, added, or removed. Ideal for scanning regressions and wins after a commit.
By Bottleneck
Colors each span by the dominant bound on its self time: instruction-bound, cache-bound, memory-bound, or system-bound. Fast way to see what is blocking work.
By Function
Colors spans by function symbol so identical functions share a color, no matter where they are called. Helps spot hot functions across call sites.
System Calls toggle
Include kernel and low-level runtime contributions. Off keeps focus on application and library code.Function list
Upon expanding a flamegraph, you can access the function list. And dive in the details of each span.