diff --git a/index.html b/index.html
index b5e5f73..4c543a0 100644
--- a/index.html
+++ b/index.html
@@ -9,8 +9,18 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>RTECH | Sovereign Industrial 2026</title>
+    <!-- Performance Optimization: Resource Hints (Preconnect/DNS-Prefetch)
+         Reduces connection setup time for critical third-party origins by ~20-50ms -->
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link rel="dns-prefetch" href="https://fonts.googleapis.com">
+    <link rel="dns-prefetch" href="https://fonts.gstatic.com">
+    <link rel="preconnect" href="https://cdn.tailwindcss.com">
+    <link rel="dns-prefetch" href="https://cdn.tailwindcss.com">
     <script src="https://cdn.tailwindcss.com"></script>
-    <link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700;800&display=swap" rel="stylesheet">
+    <!-- Performance Optimization: Variable Fonts
+         Single request for range 400..800 instead of multiple discrete weights -->
+    <link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400..800&display=swap" rel="stylesheet">
     <style>
         :root { --lime: #a3e635; --zinc-950: #09090b; }
         * { border-radius: 0 !important; font-family: 'JetBrains Mono', monospace; }
diff --git a/os2.html b/os2.html
index 20281c4..863a582 100644
--- a/os2.html
+++ b/os2.html
@@ -4,8 +4,18 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>RTECH | OS*2 Full Specifications</title>
+    <!-- Performance Optimization: Resource Hints (Preconnect/DNS-Prefetch)
+         Reduces connection setup time for critical third-party origins by ~20-50ms -->
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link rel="dns-prefetch" href="https://fonts.googleapis.com">
+    <link rel="dns-prefetch" href="https://fonts.gstatic.com">
+    <link rel="preconnect" href="https://cdn.tailwindcss.com">
+    <link rel="dns-prefetch" href="https://cdn.tailwindcss.com">
     <script src="https://cdn.tailwindcss.com"></script>
-    <link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700;800&display=swap" rel="stylesheet">
+    <!-- Performance Optimization: Variable Fonts
+         Single request for range 400..800 instead of multiple discrete weights -->
+    <link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400..800&display=swap" rel="stylesheet">
     <style>
         :root { --lime: #a3e635; --slate-950: #020617; }
         * { border-radius: 0 !important; font-family: 'JetBrains Mono', monospace; }
@@ -165,7 +175,9 @@ <h4 class="text-[10px] font-black text-slate-500 uppercase mb-6 tracking-widest"
                 status.innerText = "Status: Mirror_Sync_In_Progress";
             }
         }
-        window.onload = checkAvailability;
+            /* Performance Optimization: Execute availability check immediately
+               rather than waiting for window.onload. Improves TTI for build status. */
+        checkAvailability();
     </script>
 </body>
 </html>