Apple was silent about it.
Update iOS 12.2 continues to delight users. In the second beta version of iOS 12.2 was discovered the next innovation, which was not in the first test build of the firmware. Apple developers have accelerated one of the important functions of the application “Messages”.
In iOS 12.2 beta 2 has accelerated the tabs with images sent via iMessage. Acceleration has been significant. If in previous versions of iOS 12, and even in iOS 12.2 beta 1, when opening the list of received via iMessage photos had really long wait for their downloads, in iOS 12.2 beta 2 they progruzhat instantly.
On innovation drew the attention of many users. They all stressed that the improvement is really nice, as the current versions of the iOS image in iMessage are loaded too long. In some cases, if sent using iMessage images a lot, you have to wait a whole minute, which was annoying.
Note that this is not the images that are displayed directly in the dialog — they quickly loaded before. It is about accelerating the opening of the list of all the photos that were sent to the contact.
It is possible that in the next beta versions of iOS 12.2 such undocumented changes will be even more. The final version of iOS 12.2 is due out in February-March.