Question Fastest way to load a texture (WebGL)

I am working on a WebGL project where I have to load some high resolution textures based on users choice.
Since each file is around 2mb and there is around 40 of them, I dont wanna preload all of them. So what would be the best way to do this?

Unity documentation suggests asset bundles, but I assume thats only because they can be used for all kind of things... not sure if thats the best option when it comes to simple textures?

 

Code (CSharp):

1.  
2.  
3. public int imageId;
4.  
5. public struct Image
6. {
7.     //images
8.     public Sprite Image;
9.     public string ImageUrl;
10.     public int ImageId;
11. }
12.  
13.     public void LoadImages(int id)
14.     {
15.         imageId= id;
16.         StartCoroutine(GetImages());
17.     }
18.  
19. IEnumerator GetImages()
20.         {
21.             for (int i = 0; i < allImages.Length; i++)
22.             {
23.                 if (allImages[i].ImageId == imageId)
24.                 {
25.                     UnityWebRequest image = UnityWebRequestTexture.GetTexture(allImages[i].ImageURL);
26.                     yield return image.SendWebRequest();
27.  
28.                     if (image.isNetworkError || image.isHttpError)
29.                     {
30.                         Debug.Log(image.error);
31.                         allImages[i].Image = defaultImage; //use a placeholder image in case the remote image does not load
32.                     }
33.                     else
34.                     {
35.                         if (image.isDone)
36.                         {
37.                             Texture2D tx = ((DownloadHandlerTexture)image.downloadHandler).texture;
38.                             allImages[i].Image = Sprite.Create(tx, new Rect(0f, 0f, tx.width, tx.height), Vector2.zero, 100f);                      
39.                         }
40.                     }
41.                 }
42.             }      
43.         }
44.