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🔬 A fast, interactive web-based viewer for performance profiles.
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README.md

speedscope

A high-performance interactive web-based viewer for sampling profiles.

Example Profile

Usage

Visit https://jlfwong.github.io/speedscope/, then drop a profile onto the page.

Currently accepts the same folded stack format as the original FlameGraph scripts do: https://github.com/brendangregg/FlameGraph#2-fold-stacks.

For example, try dropping this file onto the browser window: https://raw.githubusercontent.com/jlfwong/speedscope/master/sample/perf-vertx-stacks-01-collapsed-all.txt

To pan, you can either scroll or click and drag.

To zoom, hold cmd & scroll, or pinch-to-zoom.