How to improve website performance by optimizing font loading strategies?

When looking to improve website performance, optimizing font loading strategies is a crucial step, as delays in font file loading directly impact page rendering speed and user experience. Specific optimization methods include: - **Choose efficient font formats**: Prioritize the WOFF2 format, which has a compression rate approximately 30% higher than TTF/OTF, significantly reducing loading size. - **Preload critical fonts**: Use `<link rel="preload">` to preload core fonts for above-the-fold content (such as headings and navigation text) to avoid rendering blocking. - **Control rendering behavior**: Set the display strategy during font loading via the CSS `font-display` property. For example, `font-display: swap` can display system fonts first and replace them once custom fonts are loaded, preventing page blanking. - **Font subsetting**: Retain only the characters needed for the page (e.g., common Chinese characters, core English characters) and remove redundant glyphs to reduce file size. - **Lazy load non-critical fonts**: For fonts used in non-above-the-fold or secondary text (such as small footer text), dynamically load them via JavaScript to prioritize rendering of core content. It is recommended to use performance monitoring tools (e.g., Lighthouse) to analyze font loading time, adjust strategies accordingly, balance loading speed and display quality, and avoid user loss caused by font issues.