Load testing already covers your server. Redline covers the other half: the device. Run a repeatable stress test on real hardware, keep the baseline, and turn “it feels slower” into a number you can ticket.
Run a baseline testRun the same five-subsystem stress on any device and record the Redline Index. Every future run compares against that baseline, so regressions show up as a number — not a vibe.
Load tools tell you the server held up. Redline tells you the cheap phone didn't. Together they cover both ends of the delivery path.
Send a stakeholder a Redline report instead of a screenshot of a flame chart. The verdict, cohort and fixes are written in plain engineering language.
POST a URL and a performance budget to the Redline audit endpoint. It returns 412 when the budget is breached, so a regression fails the build instead of reaching production.
Add this to any pipeline. A non-zero exit means the delivery budget was breached.
curl -sS -X POST https://redline.lovable.app/api/public/v1/audit \
-H 'content-type: application/json' \
-d '{"url":"https://example.com","budget":{"minScore":80,"maxTtfbMs":600}}' \
-o report.json -w '%{http_code}' | grep -q 200