The above has also helped me to gauge how optimized my builds were or if they were laggy at all for any reason. If you'd like, try to measure the compile times on Xcode by copying and pasting the following in your machine's terminal:ĭefaults write .Xcode ShowBuildOperationDuration -bool YES Seems like Xcode 9.2 will just have to do for now in my case.
IOS EMULATOR SLOWING MAC SIMULATOR
Haven't bothered to try Xcode 10 Beta 1 just yet as I'm sure the Simulator issues are twice as worse. Hope this provides some sort of solace for anyone experiencing this issue on macOS Mojave. I also attempted to use Xcode 9.3.1 and still experienced issues with the Simulator (iOS 11 versions only) seemingly continue to lag behind the same way Xcode 10.0 did. One thing that did help for sure was deleting Xcode 10 altogether, installing Xcode 9.2 as well as its respective command line tools: Luckily this is probably the last iOS project I ever have to do with Xcode.įixed my issue by installing Xcode 9.2 on macOS Mojave Version 10.14ĭon't think Xcode 10 is ready to be all that usable right now (at least for me and for those who have been having a lag with their Xcode Simulators).
I can't do anything else at the same time. This is even worse than ever before because now the simulator hogs 100% of CPU time, making everything in the operating system lag while the simulator is running. With Xcode 10 there framerate will fluctuate, between about 10 fps and something like 2 fps, at random intervals, making it almost unusuable. In fact, it's worse now because with Xcode 9 they were slow, but at least the framerate was quite steady and consistent. The Xcode 9 simulators were already really slow (running at about 10 fps on this iMac), but now with Xcode 10 they have become even slower.
By this point they have become so slow that they are almost unusable. With every new version of Xcode, the simulators have become increasing slower.
IOS EMULATOR SLOWING MAC FULL
They could simulate in real-time, full 60fps, even on slower Macs. I remember the time, many, many years ago, when the iOS simulators were actually extremely light, fast and efficient.
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