linearvoid/scripts/loadtest/README.md

Load Test Scaffolding

These files back the scaling/performance playbook.

WebSocket chat

Run with an explicit WebSocket URL, for example:

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:

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:

$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:

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:

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:

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:

$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:

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.

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

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

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.