Why is develop so slow in Lr classic? It takes forever for a new picture to load when I am going through the filmstrip. I have a high performance windows 10 system with 32gb of ram.
I've found that, whilst overall it's more responsive, sometimes in Develop module it becomes slow as molasses and the CPUs cores will run flat out for a while. Then it'll calm down and respond again, and then suddenly become impossibly slow again. Memory usage during these periods is fine, so it doesn't appear to be paging or anything OS-related, as it's just the Lightroom process.
I don't know if it's kicking off background housekeeping or what, but on a fast i7 laptop with SSD it's absolutely unusable when it does this.