"and there’s a reason for that" "The code isn’t slow. It just happens to be the code that’s holding the main thread." "dealing with the main thread becomes the important part" "What to remember for now is that holding the main thread for a long time is the same thing as freezing the screen." "One thing not to misread here is"

I realize the author may not write native English, but this is not translation slop, it's AI writing slop.