Hi,
I just downloaded Xcode 10 Beta 1 and I found that iOS Simulator is much slower than the previous one.
My entire System (macOS High Sierra) become sluggish, like running at 2-3 fps...
I have a Mac Pro 2012 with a Non-Metal GPU. Is a GPU relative problem?
However Xcode 10 has removed the old iOS Simulator from Xcode 9.4 (non beta) package...
So I must re-download Xcode 9.4, very annoying.