CSS: Using every declaration just once - Make the Web Faster — Google DevelopersOverviewPageSpeedAnalysisInsightsAboutMobile AnalysisInsights ExtensionInsights APIDocumentationGetting StartedPerformance TipsReferenceRelease NotesTerms of ServiceResourcesLibraries and SamplesAPIs ConsoleLibrariesRulesAvoid landing page redirectsAvoid pluginsConfigure the viewportEnable compressionImprove server response timeLeverage browser cachingMinify resourcesOptimize imagesOptimize CSS de
