[null,null,["上次更新時間:2024-09-03 (世界標準時間)。"],[[["This PageSpeed Insights API version (v4) is deprecated and will be shut down; please use the latest version (v5) for real-world and lab data."],["PageSpeed Insights (PSI) displays speed data from the Chrome User Experience Report, reflecting user experience over the past 30 days and updated daily."],["While PSI offers optimization suggestions, it's crucial to weigh implementation costs against the potential benefits for your specific website."],["If speed data for a URL is unavailable in the CrUX dataset, consider using Lighthouse for a performance audit and optimization recommendations."]]],["PageSpeed Insights (PSI) uses Chrome User Experience Report (CrUX) data, updated daily, to analyze a site's speed, either at the URL or origin level. PSI offers optimization suggestions based on web performance best practices and uses FCP and DCL metrics. PSI cautions that not all recommendations may be suitable for every site and suggests evaluating the cost versus benefit of implementing them. PSI uses a Blink renderer to fetch site data, showing captchas occasionally to ensure real user access, and it recommends CrUX data and Lighthouse for performance audits.\n"]]