# Three-lane convergence: requests, latency, regions (Quint Convergence example)

> WestCoast Charts 1.1.5, release, public Core release, on npm. HTML: https://westcoast-charts.com/gallery/quint-convergence/three-lane/ · Index for agents: https://westcoast-charts.com/llms.txt

A compact convergence view with three lanes and a stronger lens (×6, 30 min of context on each side).

- Chart type: `quintConvergence` (Quint Convergence)
- Collection: Quint Convergence · Quint Convergence
- Raw configuration: https://westcoast-charts.com/gallery-src/quint-convergence/three-lane.js
- Standalone example: https://westcoast-charts.com/embed/samples/wcc/premium/quint.html?only=convergence-three

## Setup

```js
import WestCoastCharts from 'west-coast-charts'
import premium from 'west-coast-charts/premium'
import quint from 'west-coast-charts/layers/quint'

WestCoastCharts.use(premium).use(quint)
const WestCoastChartsPremium = premium
const WestCoastChartsLayer_quint = quint
WestCoastCharts.setLicenseKey(LICENCE_KEY) // paid production licence; localhost evaluation needs no key
```

## Options

```js
const options = {
  "chart": {
    "type": "quintConvergence",
    "height": "auto"
  },
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      "keys": [
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        9.1,
        9.4,
        8.6,
        9.6,
        9,
        9.5,
        9.4,
        8.7,
        9.4,
        9.6,
        8.8,
        9.4,
        8.9,
        9.1,
        8.9,
        9.5,
        9.1,
        10.1,
        10,
        10.3,
        10.4,
        10.3,
        9.8,
        10.5,
        10.7,
        11.1,
        10.9,
        11.3,
        11.8,
        11.3,
        12.2,
        12.8,
        13.3,
        13.3,
        12.7,
        13.9,
        13.7,
        15.5,
        14.9,
        16.1,
        16,
        15.8,
        17.1,
        17.3,
        17.8,
        19.1,
        20.1,
        19.2,
        20.2,
        21.1,
        20.8,
        21,
        22.4,
        21.4,
        23.7,
        23,
        24.2,
        23.1,
        24.8,
        24.9,
        22.5,
        24.5,
        25.3,
        24.3,
        24.6,
        25.1,
        24.2,
        22.1,
        22.5,
        23.7,
        23.1,
        23,
        22.7,
        22,
        21.5,
        21.6,
        21.1,
        18.8,
        18.2,
        17.5,
        17.9,
        17.9,
        17.5,
        17.1,
        16.3,
        15.5,
        14.8,
        13.9,
        14.8,
        13.6,
        14.2,
        12.3,
        12.3,
        21.4,
        21.9,
        21.3,
        20.5,
        15.6,
        11.4,
        10.1,
        10.6,
        10.8,
        10.2,
        10.1,
        10.2,
        10,
        9.5,
        9.7,
        9.3,
        9.3,
        9,
        8.9,
        8.8,
        8.8,
        9.3,
        9.2,
        9.3,
        9.6,
        8.7,
        9.3,
        9.4,
        9.2,
        9.3,
        9.2,
        9.4
      ]
    },
    {
      "name": "US",
      "lane": "region",
      "color": "#818cf8",
      "data": [
        8.3,
        7.8,
        7.6,
        7.2,
        6.9,
        7.5,
        7.2,
        7.3,
        6.7,
        6.6,
        7,
        6.6,
        6.2,
        6.8,
        6.3,
        6.4,
        6.3,
        6.3,
        6.2,
        6.1,
        6.5,
        6.1,
        5.9,
        6.2,
        6.4,
        5.9,
        5.7,
        6.1,
        5.9,
        6,
        6.3,
        6.4,
        5.8,
        6.2,
        5.7,
        6.1,
        6.3,
        6,
        5.9,
        6,
        5.9,
        5.9,
        6.3,
        5.7,
        6.3,
        5.8,
        6,
        5.7,
        6.2,
        6,
        6.3,
        5.7,
        6.3,
        5.7,
        6.4,
        6.2,
        6,
        6,
        6.4,
        5.8,
        5.8,
        6.1,
        6,
        5.9,
        6.4,
        6.5,
        6.2,
        6.5,
        6.7,
        6.4,
        6.2,
        6.8,
        6.5,
        7.1,
        6.9,
        6.9,
        6.9,
        7.7,
        7.2,
        7.4,
        8.3,
        8.4,
        8,
        8.4,
        9.1,
        9.7,
        9.9,
        9.8,
        10.2,
        10.8,
        10.9,
        11.8,
        13,
        12.3,
        12.7,
        14.6,
        13.7,
        14.7,
        14.8,
        16.8,
        16.6,
        18.3,
        17.2,
        18.3,
        18.2,
        19.2,
        19,
        19.4,
        22,
        20.6,
        20.9,
        23,
        21.8,
        23.1,
        23.6,
        22.3,
        22,
        22.9,
        22.2,
        23.8,
        23.6,
        22.3,
        22,
        22.8,
        21.9,
        21.6,
        20.1,
        20.9,
        19.7,
        18.5,
        19.3,
        19.2,
        17.3,
        17.5,
        17.5,
        16.7,
        15.2,
        14.7,
        14.6,
        13.4,
        14.1,
        12.9,
        11.7,
        12.1
      ]
    },
    {
      "name": "APAC",
      "lane": "region",
      "color": "#34d399",
      "data": [
        7,
        7.2,
        7.8,
        7.7,
        8.3,
        8,
        8.8,
        8.8,
        8.8,
        10,
        9.3,
        10,
        10.2,
        10.7,
        10.8,
        11.5,
        12.1,
        11.9,
        12.5,
        12.2,
        12.1,
        12.4,
        13.3,
        12.8,
        14.1,
        12.9,
        14,
        14.2,
        13.7,
        13.2,
        13.2,
        14.1,
        13.5,
        14.2,
        13.1,
        14.3,
        14.3,
        12.9,
        12.7,
        12.7,
        13,
        13.2,
        12.8,
        11.9,
        11.6,
        11.5,
        11.4,
        10.5,
        10.1,
        9.6,
        10.3,
        9.8,
        8.7,
        8.5,
        8.3,
        8.1,
        8.3,
        7.4,
        7.3,
        7.1,
        7,
        7.4,
        6.4,
        6.4,
        6.4,
        6.4,
        6.2,
        6.2,
        6.2,
        6.1,
        5.6,
        5.9,
        5.8,
        5.6,
        5.7,
        5.5,
        5.4,
        5.2,
        5.1,
        5.1,
        5,
        4.9,
        5.3,
        5,
        5.1,
        5.1,
        4.9,
        5.1,
        5.3,
        5.2,
        5.3,
        5.2,
        5.2,
        4.8,
        4.8,
        5.3,
        5,
        5,
        4.8,
        5.1,
        5.1,
        5.1,
        4.7,
        5,
        4.7,
        4.8,
        4.7,
        5.2,
        5.2,
        5.1,
        5.2,
        5.2,
        4.9,
        5,
        5.2,
        5.1,
        5.2,
        5.2,
        4.8,
        5.1,
        4.9,
        5.1,
        5,
        4.9,
        5.3,
        5.1,
        4.9,
        5.3,
        5.1,
        5.1,
        5.1,
        5,
        5.2,
        5.4,
        5.4,
        5.5,
        5.6,
        5.6,
        5.2,
        5.7,
        5.4,
        5.6,
        5.8,
        5.7
      ]
    }
  ],
  "plotOptions": {
    "quint": {
      "time": {
        "start": "2026-10-24T00:00:00.000Z",
        "step": 600000
      },
      "lanes": [
        {
          "id": "req",
          "kind": "events",
          "title": "Requests",
          "unit": "requests / 10 min"
        },
        {
          "id": "svc",
          "kind": "lines",
          "title": "p95 latency per service",
          "unit": "ms"
        },
        {
          "id": "region",
          "kind": "stacked",
          "title": "Traffic by region",
          "unit": "requests / s"
        }
      ],
      "markers": [
        {
          "time": "2026-10-24T01:40:00.000Z",
          "kind": "pipeline",
          "label": "nightly build #812"
        },
        {
          "time": "2026-10-24T04:10:00.000Z",
          "kind": "deploy",
          "label": "search v5.2",
          "keys": [
            "Search",
            "us-k8s-1"
          ]
        },
        {
          "time": "2026-10-24T06:00:00.000Z",
          "kind": "pipeline",
          "label": "db backup verify"
        },
        {
          "time": "2026-10-24T07:20:00.000Z",
          "kind": "deploy",
          "label": "auth v3.8",
          "keys": [
            "Auth",
            "eu-k8s-1"
          ]
        },
        {
          "time": "2026-10-24T09:50:00.000Z",
          "kind": "deploy",
          "label": "catalog v1.19",
          "keys": [
            "Catalog",
            "us-k8s-1"
          ]
        },
        {
          "time": "2026-10-24T11:30:00.000Z",
          "kind": "pipeline",
          "label": "CI main #4790"
        },
        {
          "time": "2026-10-24T13:00:00.000Z",
          "kind": "deploy",
          "label": "inference model r27",
          "keys": [
            "Inference",
            "gpu-inf-1"
          ]
        },
        {
          "time": "2026-10-24T14:40:00.000Z",
          "kind": "pipeline",
          "label": "CI main #4802"
        },
        {
          "time": "2026-10-24T16:10:00.000Z",
          "kind": "deploy",
          "label": "payments v4.0.3",
          "keys": [
            "Payments",
            "eu-k8s-2"
          ]
        },
        {
          "time": "2026-10-24T18:30:00.000Z",
          "kind": "deploy",
          "label": "checkout v2.41",
          "keys": [
            "Checkout",
            "eu-k8s-2"
          ]
        },
        {
          "time": "2026-10-24T19:30:00.000Z",
          "kind": "deploy",
          "label": "checkout v2.41.1 (rollback)",
          "keys": [
            "Checkout",
            "eu-k8s-2"
          ]
        },
        {
          "time": "2026-10-24T22:00:00.000Z",
          "kind": "pipeline",
          "label": "CI main #4815"
        }
      ],
      "incidents": [
        {
          "from": "2026-10-24T18:40:00.000Z",
          "to": "2026-10-24T19:20:00.000Z",
          "label": "EU checkout errors on eu-k8s-2",
          "keys": [
            "Checkout",
            "eu-k8s-2",
            "EU"
          ]
        }
      ],
      "lens": {
        "factor": 6,
        "pad": 1800000
      }
    }
  }
}

const chart = new WestCoastCharts(document.querySelector('#chart'), options)
await chart.render()
```

## Verify

- Text check (Library 1.1.5): load `west-coast-charts/agent/describe` and call `chart.describe({ format: "json" })` for the actual drawn state. The live reader is on this example’s HTML page.
- Command line (Public agent tools 0.2.3, tested with Library 1.1.5; available from the versioned GitHub release and npm, https://westcoast-charts.com/docs/cli/index.md): `wcc chart export quint-convergence-three-lane.json --out quint-convergence-three-lane.svg --with-table` (save the options above as JSON first)