diff --git a/.jules/bolt.md b/.jules/bolt.md
index f1a8c1466..9a89d7d23 100644
--- a/.jules/bolt.md
+++ b/.jules/bolt.md
@@ -77,3 +77,7 @@ Optimized metric route processing to O(N) by creating a mapping of routes direct
 ## 2024-07-13 - [Optimize Export Dictionary FK lookups]
 **Learning:** Found O(N * C * E) performance bottleneck in ERD export dictionaries due to repeated array searching with `edges.some()` inside a nested loop over nodes and columns.
 **Action:** Replace repeated linear array scans for edges by precomputing O(1) Set lookups of foreign key column handles per node before looping.
+
+## 2024-08-25 - [Search Performance] 노드 텍스트 통합 및 WeakMap 캐싱을 통한 ERD 검색 최적화
+**Learning:** 다수의 문자열 필드를 개별적으로 `.toLocaleLowerCase()` 호출하여 검색하면, 검색어 입력마다 수많은 문자열 객체가 생성되어 GC 부하와 프레임 드랍이 발생합니다. V8의 단일 문자열 탐색이 JS 루프보다 훨씬 빠릅니다.
+**Action:** 노드의 모든 검색 대상 텍스트를 하나의 문자열로 결합한 뒤 소문자로 변환하고, 이를 안정적인 `node.data` 객체를 키로 하는 `WeakMap`에 캐싱하여 O(1) 조회로 최적화해야 합니다.
diff --git a/frontend/src/erd/search.ts b/frontend/src/erd/search.ts
index 51806947a..69c3bb053 100644
--- a/frontend/src/erd/search.ts
+++ b/frontend/src/erd/search.ts
@@ -2,21 +2,25 @@ import type { Node } from "@xyflow/react";
 
 import type { TableNodeData } from "./convert";
 
-function fieldIncludes(value: string | null | undefined, term: string): boolean {
-  return Boolean(value && value.toLocaleLowerCase().includes(term));
-}
+const nodeSearchTextCache = new WeakMap<TableNodeData, string>();
+
+function getNodeSearchText(node: Node<TableNodeData>): string {
+  let text = nodeSearchTextCache.get(node.data);
+  if (text !== undefined) return text;
 
-function nodeIncludesTerm(node: Node<TableNodeData>, term: string): boolean {
-  if (fieldIncludes(node.data.title, term)) return true;
-  if (fieldIncludes(node.data.comment, term)) return true;
+  const parts: string[] = [];
+  if (node.data.title) parts.push(node.data.title);
+  if (node.data.comment) parts.push(node.data.comment);
 
-  for (const column of node.data.columns) {
-    if (fieldIncludes(column.column_name, term)) return true;
-    if (fieldIncludes(column.data_type, term)) return true;
-    if (fieldIncludes(column.column_comment, term)) return true;
+  for (const col of node.data.columns) {
+    if (col.column_name) parts.push(col.column_name);
+    if (col.data_type) parts.push(col.data_type);
+    if (col.column_comment) parts.push(col.column_comment);
   }
 
-  return false;
+  text = parts.join(" ").toLocaleLowerCase();
+  nodeSearchTextCache.set(node.data, text);
+  return text;
 }
 
 export function tableNodeMatchesSearch(
@@ -29,7 +33,9 @@ export function tableNodeMatchesSearch(
         new Set(search.trim().toLocaleLowerCase().split(/\s+/).filter(Boolean)),
       );
   if (terms.length === 0) return false;
-  return terms.every((term) => nodeIncludesTerm(node, term));
+
+  const nodeText = getNodeSearchText(node);
+  return terms.every((term) => nodeText.includes(term));
 }
 
 export function findSearchMatchedNodeIds(