# Load Test Scaffolding

These files back the [scaling/performance playbook](../../docs/operations/scaling-performance-playbook.md).

## WebSocket chat

Run with an explicit WebSocket URL, for example:

```bash
WS_URL=wss://linearvoid.tv/ws?username=loadtest&room=main npx artillery run scripts/loadtest/ws-chat.yml
```

Capture output to an artifact file for the worksheet:

```bash
WS_URL=wss://linearvoid.tv/ws?username=loadtest&room=main npx artillery run scripts/loadtest/ws-chat.yml --output artifacts/ws-chat-report.json
```

PowerShell equivalent:

```powershell
$env:WS_URL = 'wss://linearvoid.tv/ws?username=loadtest&room=main'
New-Item -ItemType Directory -Force artifacts | Out-Null
npx artillery run scripts/loadtest/ws-chat.yml --output artifacts/ws-chat-report.json
```

Summarize key counters, rates, and available percentile stats from a saved Artillery JSON report:

```powershell
pwsh -File scripts/loadtest/summarize-artillery.ps1 -ReportFile artifacts/ws-chat-report.json
```

## Admin API

Run with a cookie or session header that can access admin endpoints:

```bash
ADMIN_BASE_URL=https://linearvoid.tv ADMIN_SESSION_COOKIE="session=..." k6 run scripts/loadtest/admin-api.js
```

Capture machine-readable metrics and a text summary:

```bash
ADMIN_BASE_URL=https://linearvoid.tv ADMIN_SESSION_COOKIE="session=..." k6 run --summary-export artifacts/admin-api-summary.json scripts/loadtest/admin-api.js > artifacts/admin-api-output.txt
```

PowerShell equivalent:

```powershell
$env:ADMIN_BASE_URL = 'https://linearvoid.tv'
$env:ADMIN_SESSION_COOKIE = 'session=...'
New-Item -ItemType Directory -Force artifacts | Out-Null
k6 run --summary-export artifacts/admin-api-summary.json scripts/loadtest/admin-api.js | Tee-Object -FilePath artifacts/admin-api-output.txt
```

The script emits global and per-endpoint thresholds (overview, analytics, chat-log, users) so p95 and error-rate regressions are visible per route.

Summarize endpoint p95 and failure rates from a saved k6 JSON summary:

```powershell
pwsh -File scripts/loadtest/summarize-k6.ps1 -SummaryFile artifacts/admin-api-summary.json
```

## PowerShell helper

Use the helper to run one scenario or both and automatically write outputs into a dated artifact folder:

- The helper resolves scenario paths from its own script location, so it can be run from any current working directory.
- WebSocket runs also emit `ws-chat-summary.txt` with connection/error counters and available summary percentiles.
- Admin runs also emit `admin-api-endpoint-summary.txt` with per-endpoint p95/error values.

```powershell
pwsh -File scripts/loadtest/run-loadtests.ps1 -Scenario ws -WsUrl 'wss://linearvoid.tv/ws?username=loadtest&room=main'
```

```powershell
pwsh -File scripts/loadtest/run-loadtests.ps1 -Scenario admin -AdminBaseUrl 'https://linearvoid.tv' -AdminSessionCookie 'session=...'
```

```powershell
pwsh -File scripts/loadtest/run-loadtests.ps1 -Scenario all -WsUrl 'wss://linearvoid.tv/ws?username=loadtest&room=main' -AdminBaseUrl 'https://linearvoid.tv' -AdminSessionCookie 'session=...'
```

## Notes

- Adjust target URLs for test lab or production.
- Keep the same commit SHA or image tag when comparing runs.
- Record results using the worksheet in `docs/operations/scaling-performance-playbook.md`.
- Store raw outputs under an `artifacts/` folder per run date (for example `artifacts/2026-08-09/`).
- The repository `.gitignore` excludes benchmark artifacts by default.