perf: performance improvements 1

toju-app/src/app/domains/attachment/application/services/attachment-manager.service.ts

@@ -10,7 +10,11 @@ import { RealtimeSessionFacade } from '../../../../core/realtime';
 import { selectCurrentUserId } from '../../../../store/users/users.selectors';
 import { DatabaseService } from '../../../../infrastructure/persistence';
 import { yieldToAttachmentHydrationLoop } from '../../domain/logic/attachment-blob.rules';
-import { buildAttachmentDisplayPinKey, shouldRevokeDisplayBlobForAttachment } from '../../domain/logic/attachment-blob-eviction.rules';
+import {
+  buildAttachmentDisplayPinKey,
+  collectMessageIdsForInactiveRoomBlobRelease,
+  shouldRevokeDisplayBlobForAttachment
+} from '../../domain/logic/attachment-blob-eviction.rules';
 import {
   getWatchedAttachmentRoomIdFromUrl,
   isDirectMessageAttachmentRoomId,
@@ -68,8 +72,14 @@ export class AttachmentManagerService {
         return;
       }
 
+      const previousRoomId = this.watchedRoomId;
+
       this.watchedRoomId = this.extractWatchedRoomId(event.urlAfterRedirects || event.url);
 
+      if (this.watchedRoomId !== previousRoomId) {
+        this.releaseDisplayBlobsForInactiveRooms(this.watchedRoomId);
+      }
+
       if (this.watchedRoomId) {
         void this.restoreLocalAttachmentsForRoom(this.watchedRoomId);
         void this.requestAutoDownloadsForRoom(this.watchedRoomId);
@@ -211,6 +221,18 @@ export class AttachmentManagerService {
     }
   }
 
+  releaseDisplayBlobsForInactiveRooms(activeRoomId: string | null): void {
+    const messageIds = collectMessageIdsForInactiveRoomBlobRelease(
+      Array.from(this.runtimeStore.getAttachmentEntries(), ([messageId]) => messageId),
+      (messageId) => this.runtimeStore.getMessageRoomId(messageId) ?? null,
+      activeRoomId
+    );
+
+    for (const messageId of messageIds) {
+      this.revokeOffscreenDisplayBlobsForMessage(messageId);
+    }
+  }
+
   requestFile(messageId: string, attachment: Attachment): Promise<void> {
     return this.transfer.requestFile(messageId, attachment);
   }