tools / flamegraph-viewer
Flamegraph Viewer
Analyze folded stacks, profiler summaries, hot paths, samples, and function-level performance evidence.
3 signals detected. Start with folded stack format.
Folded stack format
Folded stack samples are present.
Sort by sample count and focus on the hottest repeated stack first.
Rendering work
UI rendering may be a performance driver.
Check unnecessary renders, memoization boundaries, layout thrashing, and large lists.
I/O or database work
I/O appears in the sampled path.
Confirm whether wall time is CPU, I/O wait, or lock contention.
main;render;serialize 1200
main;render;formatDate 600
main;db;query 300
DebugTools product
Flamegraph Viewer
Flamegraph Viewer is a focused DebugTools mini-product for developers. Analyze folded stacks, profiler summaries, hot paths, samples, and function-level performance evidence.
Use cases
- Identify slow paths, hot operations, large bundles, and runtime bottlenecks.
- Compare before/after evidence while tuning performance.
- Summarize profiler output into follow-up actions.
How it works
- Paste or load the snippet you want to inspect in Flamegraph Viewer.
- Run the tool in the browser and review the highlighted output.
- Copy, export, or turn the result into the next debugging step.
Privacy
- Flamegraph Viewer is local-first. The core workflow runs in your browser and does not require sending pasted content to DebugTools servers.
This tool history
Recent Flamegraph Viewer sessions
Only visits for this tool are shown. Pasted content, tokens, request bodies, and logs are not stored here.