This has gotten so bad on my 1020. Granted I am using DP8.1. Just wondering if others are seeing it like me. Sometimes 8 seconds of waiting after unlock
Found the following post. Followed the instructions and it seems to have solved my problem. If it comes back, I'll post an update, but so far, so good.
How to fix the 'resuming' bug after uninstalling Live Lock Screen beta | Windows Central