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記錄一次 Express HTTP response compression 實驗：本機 Lighthouse payload 雖減少 49%，但正式環境已有 Cloudflare 提供 Brotli；在缺少 origin latency、cache hit 與 CPU 數據前，最終決定不在應用層啟用即時壓縮。
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記錄一次首頁 CSS 背景圖的 LCP 優化：將 PNG 改成 WebP、透過 SSR preload 提早下載，並釐清 Lighthouse headline LCP 與 observed breakdown 為何可能相差十幾秒。- Published on
記錄一次 React SSR 首頁的 CLS 優化：從 Lighthouse 標記的位移元素往上追查原因，讓首屏資料在 SSR 階段完成，並替非同步載入的圖表預留空間。