Server-Timing response headers will pass through to the client
On August 10, 2026, Vercel's CDN will stop stripping the Server-Timing response header and begin passing it through to the client. Use Server-Timing to report backend metrics like database query time and cache hits. These values appear in the browser's network panel and as PerformanceServerTiming entries through the Performance API.
Read Vercel's release noteshttps://vercel.com/changelog/server-timing-header
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