# Flame graph

> Where the time went in one run. Sample data: one agent run of 8.4 s, plan, research and answer, coloured by model, tool, retrieval and wait.

- Type 074 · Part of a whole
- Component: `<FlameGraph>`, the same name as the Figma component
- Install: `npx shadcn add @chartory/flame-graph` (free in Hearth: the public registry, no token; Signal with Code and Complete)
- Type page: https://usechartory.com/charts/flame-graph

## Installation

1. **Set up the registry once.** This chart is free in Hearth and MIT licensed: no token. Add @chartory to components.json once (the URL alone, no headers), or skip this when another chart is already installed. [Installation guide](https://usechartory.com/docs/installation)

2. **Add the chart.** One command adds the Flame graph component to your project.

```bash
npx shadcn add @chartory/flame-graph
```

3. **Use it.** Pass your rows. The props are the Figma properties.

usage.tsx:

```tsx
import { FlameGraph }
  from "@/components/chartory/flame-graph"

<FlameGraph
  data={agentTrace}
  size="m"
  legend
/>
```

## Props

### `<FlameGraph>`

Every prop but data is a Figma property with the same name and values.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| data | FlameGraphData | Required | The chart's data. The tables below list every field. |
| size | "xs" \| "s" \| "m" \| "l" | "m" | The size class. Each one is laid out again from the data. |
| legend | boolean | true | Shows the legend row under the plot. |
| color | "cat-1" \| "cat-2" \| "cat-3" \| "cat-4" | "cat-1" | The data colour of the primary marks (data/primary). |

### FlameGraphData

The data prop: one object for the whole chart.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| total | number | Required | The total. |
| xt | [number, string][] | Required | The x axis ticks: [value, label] pairs. |
| spans | FlameGraphSpan[] | Required | One entry per span. |

### FlameGraphSpan

One object per entry in spans.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| label | string | Required | The name shown on the chart. |
| d | number | Required | The depth (0 is the root). |
| s | number | Required | Where the span starts. |
| e | number | Required | Where the span ends. |
| tok | string | Required | The colour token, e.g. "data/primary". |

## Flame graph: a React and Figma chart in four sizes

### What does a flame graph show?

A flame graph shows one run as stacked bars: the whole run on top, each step below it and each step's sub-steps below that, all on one time axis. Wide bars are where time went. Use it for agent traces, request traces and profiling.

Chartory ships it as a Figma component and a React component with the same name. The code installs from the shadcn registry with one command and lands in your project as a file you own.

### What is the Flame graph component?

It is one **<FlameGraph>** component. Its props are the Figma properties with the same names and values, and the props table above lists them. The data is nested spans with start and length.

Sizes **XS**, **S**, **M** and **L** re-lay the chart out from the data instead of scaling it, so labels stay readable at every size.

### When should I use it?

- **Are the steps nested?** Yes means the flame graph fits.
- **Is it one run?** Yes means the flame graph fits.
- **Is it time, not money?** Yes means the flame graph fits.

### When does another type fit better?

- **Steps in one flat list.** Use Span waterfall instead.
- **Many runs over time.** Use Latency field instead.
- **A spend breakdown.** Use Icicle instead.

## Flame graph questions

### Does the Flame graph chart work with shadcn/ui?

Yes. It installs through the shadcn registry with the shadcn CLI, and the file lands in your project.

### How do I install it?

It is free in Hearth and MIT licensed: add the @chartory registry URL once, no token, then run npx shadcn add @chartory/flame-graph. The Installation guide has the steps.

### Can my coding agent install it?

Yes. Connect the Chartory MCP server and ask for the flame graph chart; the agent runs the same command and you review the diff.

### What data does it expect?

Nested spans with start and length. The sample data comes with the component, and the props table lists every field.

### Which sizes does it ship in?

XS, S, M and L, in Figma and in code. Each size is laid out again from the data, so text and lines keep their size.

### Is it in the Figma file too?

Yes. chart/074-flame-agent-trace has the same properties as the component.

### Does it follow light and dark mode?

Yes. Every paint is a token, so the chart follows light and dark mode and the collection you pick.

### Which plan has the code?

None for Hearth: it is free in the public registry, no token. The Signal collection (@chartory/signal) comes with Code and Complete.