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2 documents tagged with “Performance budgets”

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A performance budget is an agreed limit on how much a specific metric or resource may cost. The bundle must not be bigger than 200 kB, LCP must stay under 2.5 s, the request count under 50. Whenever someone exceeds the limit, they get a warning, not two months after deployment.

Under the performance budgets tag you will find articles on configuring budgets in PageSpeed.ONE and choosing values for different types of sites.

Lighthouse Diff: Comparing Two Website Speed Tests

Lighthouse Diff is a tool for visually comparing two Lighthouse reports. It helps identify exactly what has changed on a website—from the overall score to metrics and individual recommendations.

Performance Budgets

Performance budgets are a methodology used to maintain web page speed at a predefined level. Imagine a "budget" as a limit of values for various metrics.

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