Developer builds open-source lab to benchmark SSG, SSR, and ISR on real WordPress sites

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A developer has released astro-wp-seo-lab, an open-source test environment that builds the same WordPress content using four rendering strategies in Astro 5.1.1 and serves them simultaneously for direct comparison. The project covers static site generation, server-side rendering, CDN-cached SSR, route caching, and an islands architecture, each running on a separate local port. A visible timestamp on every page acts as a practical instrument to observe whether content was rendered at build time or per request. Testing revealed that static pages delivered identical timestamps across reloads while SSR pages regenerated on every request, and the islands arm showed lower SEO parity due to deferred JavaScript fragments missing from raw HTML. The lab also highlights crawlability risks, noting that JS-only content may be indexed days late or missed entirely by non-Google crawlers, including most AI-driven bots.

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