From fbf99a9ccf94bdf212345a5b4832fd6ccb03fb55 Mon Sep 17 00:00:00 2001
From: unfr <staff@unfr.pw>
Date: Fri, 24 Apr 2026 07:47:23 +0200
Subject: [PATCH] Precharge les mappings IMDb au warmup (1.27s -> 16ms sur le
 premier appel /api?t=imdb)

---
 lib/imdbMapping.js | 9 +++++++++
 server.js          | 7 ++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/lib/imdbMapping.js b/lib/imdbMapping.js
index 032692c..91088e8 100644
--- a/lib/imdbMapping.js
+++ b/lib/imdbMapping.js
@@ -33,3 +33,12 @@ export async function lookupImdb(imdbId) {
   }
   return null;
 }
+
+// Eager-load both mappings — used at server startup to remove the first-request
+// 1s latency. Returns the number of entries loaded per type.
+export async function preloadMappings() {
+  const out = { movie: 0, tv: 0 };
+  try { out.movie = (await loadOne('movie')).size; } catch { /* missing */ }
+  try { out.tv = (await loadOne('tv')).size; } catch { /* missing */ }
+  return out;
+}
diff --git a/server.js b/server.js
index f334a09..295b4ab 100644
--- a/server.js
+++ b/server.js
@@ -5,6 +5,7 @@ import secureSession from '@fastify/secure-session';
 import fastifyStatic from '@fastify/static';
 import Fastify from 'fastify';
 import { HOST, PORT, RATE_LIMIT_PER_SEC, ROOT, SESSION_SECRET } from './config.js';
+import { preloadMappings } from './lib/imdbMapping.js';
 import { getRatings } from './lib/imdbRatings.js';
 import { httpDuration, httpRequests, imdbRatingsCount, searchWorkers } from './lib/metrics.js';
 import { getPool } from './lib/searchEngine.js';
@@ -80,7 +81,11 @@ fastify.ready().then(async () => {
     const tv = getPool('tv');
     searchWorkers.set({ type: 'movie' }, movie.workers.length);
     searchWorkers.set({ type: 'tv' }, tv.workers.length);
-    fastify.log.info({ ratings: ratings.size }, 'Warmup complete');
+    const maps = await preloadMappings();
+    fastify.log.info(
+      { ratings: ratings.size, imdb_movie: maps.movie, imdb_tv: maps.tv },
+      'Warmup complete',
+    );
   } catch (err) {
     fastify.log.warn({ err }, 'Warmup failed');
   }