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Underscore.js adoption & performance trends

2 quarters of aggregate data

Unique domains per quarter

Underscore.js -- Unique domains per quarterUnderscore.js -- Unique domains per quarter047.995.7143.6191.4Q2 '26Q3 '26

Median composite score

Underscore.js -- Median composite scoreUnderscore.js -- Median composite score0255075100Q2 '26Q3 '26

Median Lighthouse performance

Underscore.js -- Median Lighthouse performanceUnderscore.js -- Median Lighthouse performance0255075100Q2 '26Q3 '26

Median Lighthouse accessibility

Underscore.js -- Median Lighthouse accessibilityUnderscore.js -- Median Lighthouse accessibility0255075100Q2 '26Q3 '26

How this is calculated

Each point is the median across all public Underscore.js audits completed that quarter. Quarters with fewer than 3 audits are skipped.

Learn more about our methodology →

Raw data

QuarterUnique domainsCompositePerformanceAccessibility
Q2 '26174723887
Q3 '269794090