Macbook Pro 2016
16 GB RAM
500 GB SSD
Same, this is ridiculous. I have Macbook Pro 2019, 64gb ram 2tb. As soon as I updated from Catalina to Big Sur and then to xcode 12.5. Interface builder is extremely slow even just renaming views it loads. Code was building everytime, but solved by unchecking "show live issues" in preferences -> general. Very hard to write code efficiently because of this. so sluggish for no reason.
Just updated to Big Sur, and tried to re-install Xcode. Same issue, it's like molasses. Builds that took 5 minutes are now up to a hour. This is not fixed yet.
Same problem here, MacBook Air ~2015 i7 8gb ram, all was ok until the update to Xcode 13, now even I close Xcode, the swift-frontend process still in background consuming tons of gb of ram..like 50gb!! i can’t update my app to fix all the layout problems that iOS 15 made on..