Very slow 1:1 preview creation

[vitalyn38151610]

Hello, everyone. Starting with version 13.3, when creating a 1:1 preview, Lightroom started to do it several times slower, and with large volumes, it starts to annoy you when you create only previews all day. Let me know if anyone else has noticed this!

[Ian Lyons]

A new preview rendering architecture and format was introduced with LrC 13.3.

Existing previews are normally updated to the format during catalog upgrade. Unfortunately, some customers have found that the previews.lrdata file does not update. Therefore, the previews need to be recreated, which may take longer than in the past.

[fbmartinez]

Sorry, but didn't understand this respond. Does this mean the previews being generated are being generated twice? Or are you sayin that the previews.lrdata file will be regenerated entirely?

I've noticed the same thing where 1:1 previews take forever to be created - even on a fast computer with good memory, and leveraging an SSD. 

Is Adobe going to address this? It's slowing down our workflow.