perf: performance improvements 1

2026-07-14 01:34:33 +02:00
parent edc4d935d8
commit 59dfd2de85
27 changed files with 762 additions and 94 deletions
@@ -0,0 +1,46 @@
+import { shouldHydrateInlineImageForVisibility, shouldHydratePlayableMediaForVisibility } from './attachment-hydration-visibility.rules';
+
+const diskBackedImage = {
+  available: false,
+  filename: 'photo.png',
+  id: 'att-1',
+  isImage: true,
+  mime: 'image/png',
+  savedPath: '/appdata/photo.png'
+};
+const diskBackedVideo = {
+  available: false,
+  mime: 'video/mp4',
+  savedPath: '/appdata/clip.mp4'
+};
+
+describe('attachment hydration visibility rules', () => {
+  it('hydrates a disk-backed image only when the message is visible', () => {
+    expect(shouldHydrateInlineImageForVisibility(diskBackedImage, true)).toBe(true);
+    expect(shouldHydrateInlineImageForVisibility(diskBackedImage, false)).toBe(false);
+  });
+
+  it('never hydrates an image that is already displayable', () => {
+    const displayable = {
+      ...diskBackedImage,
+      available: true,
+      objectUrl: 'blob:http://localhost/abc'
+    };
+
+    expect(shouldHydrateInlineImageForVisibility(displayable, true)).toBe(false);
+  });
+
+  it('hydrates disk-backed playable media only when the message is visible', () => {
+    expect(shouldHydratePlayableMediaForVisibility(diskBackedVideo, true)).toBe(true);
+    expect(shouldHydratePlayableMediaForVisibility(diskBackedVideo, false)).toBe(false);
+  });
+
+  it('never hydrates media that already has an object URL', () => {
+    const hydrated = {
+      ...diskBackedVideo,
+      objectUrl: 'blob:http://localhost/def'
+    };
+
+    expect(shouldHydratePlayableMediaForVisibility(hydrated, true)).toBe(false);
+  });
+});