From d209816619317dfec504715d28f671edd66a68f9 Mon Sep 17 00:00:00 2001
From: "Patrik J. Braun" <bra.patrik@gmail.com>
Date: Sat, 10 Dec 2022 10:14:25 +0100
Subject: [PATCH] Making jobs and particularly preview filling job non-blocking

---
 src/backend/model/database/sql/AlbumManager.ts | 3 +++
 src/backend/model/jobs/jobs/Job.ts             | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/src/backend/model/database/sql/AlbumManager.ts b/src/backend/model/database/sql/AlbumManager.ts
index 0416ff03..c67c78bb 100644
--- a/src/backend/model/database/sql/AlbumManager.ts
+++ b/src/backend/model/database/sql/AlbumManager.ts
@@ -106,6 +106,9 @@ export class AlbumManager implements IAlbumManager {
 
     for (const a of albums) {
       await AlbumManager.updateAlbum(a as SavedSearchEntity);
+      // giving back the control to the main event loop (Macrotask queue)
+      // https://blog.insiderattack.net/promises-next-ticks-and-immediates-nodejs-event-loop-part-3-9226cbe7a6aa
+      await new Promise(setImmediate);
     }
     this.isDBValid = true;
   }
diff --git a/src/backend/model/jobs/jobs/Job.ts b/src/backend/model/jobs/jobs/Job.ts
index 7ebb7478..5538c4ec 100644
--- a/src/backend/model/jobs/jobs/Job.ts
+++ b/src/backend/model/jobs/jobs/Job.ts
@@ -144,6 +144,9 @@ export abstract class Job<T = void> implements IJob<T> {
           this.onFinish();
           return;
         }
+        // giving back the control to the main event loop (Macrotask queue)
+        // https://blog.insiderattack.net/promises-next-ticks-and-immediates-nodejs-event-loop-part-3-9226cbe7a6aa
+        await new Promise(setImmediate);
         this.run();
       } catch (e) {
         Logger.error(LOG_TAG, e);