Performance improvements: Optimize scroll events, reduce HTML size, improve resource loading

_includes/head.html

@@ -20,12 +20,11 @@
 
     <link rel="preload" as="style" href="{{ " /assets/css/style.css" | relative_url }}">
     <link rel="stylesheet" href="{{ " /assets/css/style.css" | relative_url }}">
-    <link rel="preconnect" href="https://fonts.gstatic.com">
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link rel="preload" as="style" href='https://fonts.googleapis.com/css2?family=EB+Garamond&display=swap'>
     <link href="https://fonts.googleapis.com/css2?family=EB+Garamond&display=swap" rel="stylesheet">
-    <link
-        href="data:image/x-icon;base64,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"
-        rel="icon" type="image/x-icon" />
+    <link rel="icon" type="image/png" href="{{ " /assets/images/favicon.png" | relative_url }}" />
     <link rel="alternate" type="application/rss+xml" title="{{ site.title | escape }}" href="{{ " /feed.xml" |
         relative_url }}">
     {% if jekyll.environment == 'production' %}

assets/js/s.js

@@ -7,6 +7,7 @@
   if (isHome) {
     let arrow = document.querySelector('.home-intro-scroll');
     const arrowTreshold = 100; // when stops being visible
+    let scrollTimeout;
 
     // scroll hint
     function showScrollHint(seconds) {
@@ -19,17 +20,26 @@
       }
     }
 
-    // scrolling event
-    document.addEventListener("scroll", scrollHandler);
+    // scrolling event with throttling
+    document.addEventListener("scroll", scrollHandler, { passive: true });
 
     function scrollHandler() {
-      // scroll hint
-      let scroll = document.scrollingElement.scrollTop;
-
-      // hide arrow when needed
-      if (scroll >= arrowTreshold && arrow) {
-        arrow.classList.remove("visible");
+      // Throttle scroll events to improve performance
+      if (scrollTimeout) {
+        return;
       }
+
+      scrollTimeout = setTimeout(function() {
+        scrollTimeout = null;
+
+        // scroll hint
+        let scroll = document.scrollingElement.scrollTop;
+
+        // hide arrow when needed
+        if (scroll >= arrowTreshold && arrow) {
+          arrow.classList.remove("visible");
+        }
+      }, 100);
     }
 
     // initialize scroll hint
@@ -43,17 +53,9 @@
     const start = window.pageYOffset;
     const startTime = "now" in window.performance ? performance.now() : new Date().getTime();
 
-    const documentHeight = Math.max(
-      document.body.scrollHeight,
-      document.body.offsetHeight,
-      document.documentElement.clientHeight,
-      document.documentElement.scrollHeight,
-      document.documentElement.offsetHeight
-    );
-    const windowHeight =
-      window.innerHeight ||
-      document.documentElement.clientHeight ||
-      document.getElementsByTagName("body")[0].clientHeight;
+    // Cache commonly used values
+    const documentHeight = document.documentElement.scrollHeight;
+    const windowHeight = window.innerHeight || document.documentElement.clientHeight;
     const destinationOffset =
       typeof destination === "number" ? destination : destination.offsetTop;
     let destinationOffsetToScroll = Math.round(