服务器响应时间

为何重要

Server response time (time to first byte) is the wait before anything can load. A slow server delays every metric, including Largest Contentful Paint.

如何修复

1. Enable page caching and a CDN.
2. Upgrade slow hosting or optimise database queries.
3. Aim for a response under about 600 ms.

使用以下工具检查

• Server Response Time (TTFB) Test – Measure DNS, connection, TLS and time to first byte over three requests.
• Page Speed Test – Lighthouse performance score, lab metrics and real-user Core Web Vitals for any page.

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