flamegraph ☆

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Description:
Stack trace visualizer

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | @brendangregg | formulae.brew.sh

Category: Developer tools

Tags: performance profiling visualization debugging developer-tools

Install: brew install flamegraph

About:
FlameGraph is a performance analysis tool that generates interactive flame graphs from stack trace samples. It visualizes CPU usage by representing stack frames as horizontal bars, allowing developers to quickly identify performance bottlenecks. The tool processes folded stack traces to create SVG files that highlight the most frequent code paths.

Key Features:

Generates interactive SVG flame graphs from stack samples
Supports multiple profiling formats (perf, DTrace, StackCollapse)
Lightweight and language-agnostic
Provides flame graph diffing for before/after comparisons
Includes utilities for stack trace aggregation and folding

Use Cases:

Analyzing CPU performance bottlenecks in production systems
Comparing performance profiles before and after code changes
Visualizing application behavior under load testing
Debugging latency issues in microservices architectures

Alternatives:

pprof – Go-specific profiler with built-in flame graph support, less language-agnostic
perf report – Linux native profiler with TUI interface, requires perf data format
Xcode Instruments – macOS-only GUI profiler with flame graphs, not scriptable

Version History

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