What is TWRP doing when it says "updating partition details"?
Whenever it decrypts data or applies a zip, it displays the message and then takes a rather long time.
What is it doing during that time?
topI can see that the
recoveryprocess is fully utilising a core (and more), so it's not like it's sitting around waiting for some timeout either.
Is there anything I can do to speed this up?
It's updating the partition sizes so that it doesn't get messed up while you're backing up the partition.
(Source: https://github.com/omnirom/android_bootable_recovery/blob/9d3ea68bc9e6687e94d2024d772736d80b33c4ef/partitionmanager.cpp#L1554 )