perf: limit concurrent image transcode requests

2026-02-25 17:01:43 +01:00
parent 88d7e2d319
commit 6188d21c3d
3 changed files with 33 additions and 1 deletions
@@ -0,0 +1,29 @@
+import 'dart:io';
+
+import 'package:flutter_cache_manager/flutter_cache_manager.dart';
+import 'package:http/io_client.dart';
+
+/// Custom cache manager for Plex image transcoding with connection limiting.
+///
+/// Limits concurrent HTTP connections to 6 per host (matching browser HTTP/1.1
+/// behavior) to prevent overwhelming the Plex server's transcode pipeline when
+/// many posters are visible simultaneously.
+class PlexImageCacheManager extends CacheManager with ImageCacheManager {
+  static const _key = 'plexImageCache';
+
+  static final PlexImageCacheManager instance = PlexImageCacheManager._();
+
+  PlexImageCacheManager._()
+      : super(
+          Config(
+            _key,
+            stalePeriod: const Duration(days: 30),
+            maxNrOfCacheObjects: 5000,
+            fileService: HttpFileService(
+              httpClient: IOClient(
+                HttpClient()..maxConnectionsPerHost = 6,
+              ),
+            ),
+          ),
+        );
+}