Cache LRU sur entry endpoints (movie/tv/imdb/providers) + allowlist loopback du rate limit

routes/api.js

@@ -20,19 +20,36 @@ import { filterAndLower } from '../lib/titleFilter.js';
 
 const searchCache = new LRUCache({ max: 1000, ttl: 1000 * 60 * 60 });
 
+// Entry cache covers movie/tv/imdb/providers responses. Keeps hot files in RAM
+// so repeat lookups skip disk + JSON.parse. TTL 30 min (cron may rewrite
+// underlying detail file via /changes — 30 min keeps staleness bounded).
+const entryCache = new LRUCache({ max: 5000, ttl: 1000 * 60 * 30 });
+
 async function getDetail(type, id) {
+  const key = `d:${type}:${id}`;
+  const hit = entryCache.get(key);
+  if (hit !== undefined) return hit;
   try {
     const buf = await readFile(entryPath(type, id), 'utf8');
-    return JSON.parse(buf);
+    const obj = JSON.parse(buf);
+    entryCache.set(key, obj);
+    return obj;
   } catch {
+    entryCache.set(key, null);
     return null;
   }
 }
 
 async function getProviders(type, id) {
+  const key = `p:${type}:${id}`;
+  const hit = entryCache.get(key);
+  if (hit !== undefined) return hit;
   try {
-    return JSON.parse(await readFile(justwatchPath(type, id), 'utf8'));
+    const obj = JSON.parse(await readFile(justwatchPath(type, id), 'utf8'));
+    entryCache.set(key, obj);
+    return obj;
   } catch {
+    entryCache.set(key, null);
     return null;
   }
 }