Attempt to improve LCP

RobbieTheWagner · RobbieTheWagner · commit 394de0ff655a · 2025-10-22T10:47:53.000-04:00
diff --git a/src/components/Dots.astro b/src/components/Dots.astro
@@ -1,3 +1,3 @@
 <div class="absolute top-0 left-0 flex h-12 w-full justify-center p-2">
-  <div class="bg-dots-light dark:bg-dots-dark h-12 w-full bg-repeat-x"></div>
+  <div class="bg-dots-light dark:bg-dots-dark h-12 w-full bg-repeat-x" style="content-visibility: auto;"></div>
 </div>
diff --git a/src/components/ShowArtwork.astro b/src/components/ShowArtwork.astro
@@ -33,9 +33,20 @@ const { image } = Astro.props;
 </a>
 
 <script>
-  import Atropos from 'atropos';
+  // Defer Atropos initialization to after LCP
+  function initAtropos() {
+    import('atropos').then((module) => {
+      const Atropos = module.default;
+      Atropos({
+        el: '.show-art'
+      });
+    });
+  }
 
-  Atropos({
-    el: '.show-art'
-  });
+  // Initialize after page load to avoid blocking LCP
+  if (document.readyState === 'complete') {
+    initAtropos();
+  } else {
+    window.addEventListener('load', initAtropos);
+  }
 </script>
diff --git a/src/layouts/Layout.astro b/src/layouts/Layout.astro
@@ -34,6 +34,35 @@ const { imageUrl, title } = Astro.props;
 const canonicalURL =
   Astro.props.canonicalURL ?? new URL(Astro.url.pathname, Astro.site);
 const description = Astro.props.description ?? starpodConfig.description;
+
+function extractDomain(url: string): string | null {
+  try {
+    return new URL(url).hostname;
+  } catch {
+    return null;
+  }
+}
+
+function getExternalDomains(): string[] {
+  const domains = new Set<string>();
+  const siteHostname = Astro.site?.hostname;
+
+  // Add RSS feed domain
+  const feedDomain = extractDomain(starpodConfig.rssFeed);
+  if (feedDomain && feedDomain !== siteHostname) {
+    domains.add(feedDomain);
+  }
+
+  // Add image domain if it's external
+  const imageDomain = extractDomain(show.image);
+  if (imageDomain && imageDomain !== siteHostname) {
+    domains.add(imageDomain);
+  }
+
+  return Array.from(domains);
+}
+
+const externalDomains = getExternalDomains();
 ---
 
 <!doctype html>
@@ -91,7 +120,8 @@ const description = Astro.props.description ?? starpodConfig.description;
 
     <meta property="og:site_name" content={show.title} />
 
-    <link rel="preload" as="image" href={show.image} />
+    <!-- Preload critical resources for faster LCP -->
+    <link rel="preload" as="image" href={show.image} fetchpriority="high" />
 
     <link
       crossorigin
@@ -101,6 +131,40 @@ const description = Astro.props.description ?? starpodConfig.description;
       type="font/woff2"
     />
 
+    <!-- DNS prefetch for external resources -->
+    {
+      externalDomains.map((domain) => (
+        <>
+          <link rel="dns-prefetch" href={`//${domain}`} />
+          <link rel="preconnect" href={`https://${domain}`} crossorigin />
+        </>
+      ))
+    }
+
+    <!-- Prefetch for Vercel image optimization -->
+    {Astro.site && <link rel="preconnect" href={Astro.site.origin} />}
+
+    <!-- Critical CSS for LCP optimization -->
+    <style>
+      /* Critical styles for above-the-fold content */
+      body {
+        font-family: 'Inter', system-ui, sans-serif;
+        margin: 0;
+      }
+
+      .atropos-inner img {
+        max-width: 100%;
+        height: auto;
+        display: block;
+      }
+
+      /* Ensure LCP image renders quickly */
+      .show-art img {
+        content-visibility: auto;
+        contain: layout style paint;
+      }
+    </style>
+
     <Schema
       slot="head"
       item={{
@@ -138,6 +202,7 @@ const description = Astro.props.description ?? starpodConfig.description;
       <div class="relative z-10 mx-auto lg:min-h-full lg:flex-auto">
         <div
           class="bg-light-card dark:bg-dark-card m-2 rounded-lg pt-10 pb-4 lg:pt-16 lg:pb-12"
+          style="contain: layout style;"
         >
           <ShowArtwork image={show.image} />
 
@@ -172,6 +237,7 @@ const description = Astro.props.description ?? starpodConfig.description;
       <div class="relative mt-2 pt-16">
         <div
           class="bg-gradient-light dark:bg-gradient-dark absolute top-0 right-0 left-0 z-0 h-80 w-full opacity-30"
+          style="content-visibility: auto;"
         >
         </div>
 
