diff --git a/.jules/bolt.md b/.jules/bolt.md
index af3158d3..2c35cd84 100644
--- a/.jules/bolt.md
+++ b/.jules/bolt.md
@@ -7,3 +7,8 @@
 
 **Learning:** Using `Object.entries(obj).find(([key]) => key === target)` creates O(N) array allocations for the entries and traverses them linearly just to do a simple property lookup. This adds unnecessary memory allocation overhead and Garbage Collection.
 **Action:** Use direct property lookup instead: `Object.prototype.hasOwnProperty.call(obj, target) ? obj[target as keyof typeof obj] : undefined`. This maintains O(1) performance while satisfying `security/detect-object-injection` linting rules.
+
+## 2026-10-25 - Avoid flatMap().find() in large arrays
+
+**Learning:** When searching for an item based on properties of nested arrays, using `array.flatMap(mapFn).find(findFn)` creates large intermediate arrays and unnecessarily traverses all elements, causing memory bloat and garbage collection overhead, especially in data-heavy operations like `generateStaticParams`.
+**Action:** Use nested `for...of` loops, or `.find()` with `.some()` internally (e.g. `array.find(item => item.children.some(condition))`) to immutably locate the parent element without full flat mapping, then extract the required nested value.
diff --git a/app/2026/tags/[tag]/page.tsx b/app/2026/tags/[tag]/page.tsx
index 5c9a6ebc..8f99d982 100644
--- a/app/2026/tags/[tag]/page.tsx
+++ b/app/2026/tags/[tag]/page.tsx
@@ -40,8 +40,11 @@ export async function generateMetadata({ params }: { params: Promise<{ tag: stri
 
   const sessionGroups = await getTalks(year);
   const allTalks = sessionGroups.flatMap((group) => group.sessions);
-  const displayTag =
-    allTalks.flatMap(getTagsFromTalk).find((t) => t.replaceAll(" ", "-").toLowerCase() === decodedTag.toLowerCase()) ?? decodedTag.replaceAll("-", " ");
+  const targetTag = decodedTag.toLowerCase();
+  const matchedTalk = allTalks.find((talk) => getTagsFromTalk(talk).some((t) => t.replaceAll(" ", "-").toLowerCase() === targetTag));
+  const displayTag = matchedTalk
+    ? (getTagsFromTalk(matchedTalk).find((t) => t.replaceAll(" ", "-").toLowerCase() === targetTag) ?? decodedTag.replaceAll("-", " "))
+    : decodedTag.replaceAll("-", " ");
 
   return {
     title: `Talks tagged "${displayTag}" - DevBcn ${year}`,
@@ -58,13 +61,16 @@ export default async function Page({ params }: { params: Promise<{ tag: string }
   const sessionGroups = await getTalks(year);
   const allTalks = sessionGroups.flatMap((group) => group.sessions);
 
-  const displayTag =
-    allTalks.flatMap(getTagsFromTalk).find((t) => t.replaceAll(" ", "-").toLowerCase() === decodedTag.toLowerCase()) ?? decodedTag.replaceAll("-", " ");
+  const targetTag = decodedTag.toLowerCase();
+  const matchedTalk = allTalks.find((talk) => getTagsFromTalk(talk).some((t) => t.replaceAll(" ", "-").toLowerCase() === targetTag));
+  const displayTag = matchedTalk
+    ? (getTagsFromTalk(matchedTalk).find((t) => t.replaceAll(" ", "-").toLowerCase() === targetTag) ?? decodedTag.replaceAll("-", " "))
+    : decodedTag.replaceAll("-", " ");
 
   const filteredTalks = allTalks.filter((talk) => {
     const talkTags = getTagsFromTalk(talk);
 
-    return talkTags.some((t) => t.replaceAll(" ", "-").toLowerCase() === decodedTag.toLowerCase());
+    return talkTags.some((t) => t.replaceAll(" ", "-").toLowerCase() === targetTag);
   });
 
   if (filteredTalks.length === 0) {
diff --git a/app/[year]/tags/[tag]/page.tsx b/app/[year]/tags/[tag]/page.tsx
index 35c74f61..32f91104 100644
--- a/app/[year]/tags/[tag]/page.tsx
+++ b/app/[year]/tags/[tag]/page.tsx
@@ -47,8 +47,11 @@ export async function generateMetadata({ params }: Readonly<TagPageProps>): Prom
 
   const sessionGroups = await getTalks(year);
   const allTalks = sessionGroups.flatMap((group) => group.sessions);
-  const displayTag =
-    allTalks.flatMap(getTagsFromTalk).find((t) => t.replaceAll(" ", "-").toLowerCase() === decodedTag.toLowerCase()) ?? decodedTag.replaceAll("-", " ");
+  const targetTag = decodedTag.toLowerCase();
+  const matchedTalk = allTalks.find((talk) => getTagsFromTalk(talk).some((t) => t.replaceAll(" ", "-").toLowerCase() === targetTag));
+  const displayTag = matchedTalk
+    ? (getTagsFromTalk(matchedTalk).find((t) => t.replaceAll(" ", "-").toLowerCase() === targetTag) ?? decodedTag.replaceAll("-", " "))
+    : decodedTag.replaceAll("-", " ");
 
   return {
     title: `Talks tagged "${displayTag}" - DevBcn ${year}`,
@@ -64,13 +67,16 @@ export default async function TagPage({ params }: Readonly<TagPageProps>) {
   const sessionGroups = await getTalks(year);
   const allTalks = sessionGroups.flatMap((group) => group.sessions);
 
-  const displayTag =
-    allTalks.flatMap(getTagsFromTalk).find((t) => t.replaceAll(" ", "-").toLowerCase() === decodedTag.toLowerCase()) ?? decodedTag.replaceAll("-", " ");
+  const targetTag = decodedTag.toLowerCase();
+  const matchedTalk = allTalks.find((talk) => getTagsFromTalk(talk).some((t) => t.replaceAll(" ", "-").toLowerCase() === targetTag));
+  const displayTag = matchedTalk
+    ? (getTagsFromTalk(matchedTalk).find((t) => t.replaceAll(" ", "-").toLowerCase() === targetTag) ?? decodedTag.replaceAll("-", " "))
+    : decodedTag.replaceAll("-", " ");
 
   const filteredTalks = allTalks.filter((talk) => {
     const talkTags = getTagsFromTalk(talk);
 
-    return talkTags.some((t) => t.replaceAll(" ", "-").toLowerCase() === decodedTag.toLowerCase());
+    return talkTags.some((t) => t.replaceAll(" ", "-").toLowerCase() === targetTag);
   });
 
   if (filteredTalks.length === 0) {