Build a developer tool that turns website performance targets into enforceable budgets for pages, assets, and application features.
Allow users to define budgets for JavaScript size, CSS size, image weight, font payloads, request counts, and performance metrics. Accept Lighthouse JSON reports or structured performance measurements as inputs.
Include:
A performance budget editor with separate thresholds for mobile and desktop.
A report comparison engine that identifies regressions between builds.
An asset-level breakdown showing which files contribute most to budget violations.
A route comparison view for identifying unusually heavy pages.
Suggested optimization experiments ranked by likely impact and implementation effort.
A CI-friendly JSON report with configurable pass, warning, and fail thresholds.
Historical tracking of performance measurements.
A sample project that demonstrates how a regression blocks a release.
Never claim to measure a live website unless an actual measurement has been supplied or performed through a supported integration. Distinguish laboratory measurements from real-user data. Make the budget rules deterministic, testable, and easy to integrate into an existing development pipeline.
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