What Is a Performance Score?
A performance score is a composite rating, typically on a zero-to-one-hundred scale, that audit tools derive by weighting individual metrics such as first contentful paint, largest contentful paint, total blocking time, and cumulative layout shift. It rolls several signals into one headline number. The weighting means no single metric fully determines the result.
Why it matters
A performance score gives teams an at-a-glance target and a convenient threshold to gate builds on in CI. Because it is composite, a drop still requires looking at the underlying metrics to diagnose.
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