flamelens

flamelens [options] [file]

flamelens is an interactive flamegraph viewer that runs in the terminal. It allows users to explore profiling data in a visual, navigable format without requiring a web browser or GUI.
The tool supports folded stack format (generated by tools like perf, dtrace, or brendan gregg's stack collapse scripts) and provides vim-style navigation, search, and zoom capabilities.

-s, --search PATTERN

Search for pattern in stacks

Use ASCII instead of Unicode characters

Disable colored output

Display help and exit

Display version and exit

↑/↓ or k/j

Navigate up/down through frames

Zoom out/in on selected frame

Search mode

Next/previous search result

Focus on selected frame

Exit zoom/return to full view

Quit

Requires folded stack format input. Very large profiles may impact performance. Terminal must support Unicode for best display. Some profilers require additional scripts to produce compatible output.

flamelens was created as a terminal-based alternative to web-based flamegraph viewers, enabling profile analysis in server environments without browser access.

[inferno](https://github.com/jonhoo/inferno), [flamegraph](https://github.com/brendangregg/FlameGraph), [cargo-flamegraph](https://github.com/flamegraph-rs/flamegraph)