Xcode 9 iOS 11 simulator extremely slow when app is run for the first time. Has anyone experienced the same? Slow Animations feature of the simulator has already been unchecked.
1 Answers
Yeah, it’s just a bug in Xcode
There is a bug in OpenGLES.framework in the iOS 11/tvOS 11/watchOS 4 Simulators that causes them to skip loading the LLVM JIT and fall back to interpreting shaders. This has a severe performance impact on the Simulator since it is entirely software-rendered OpenGL (this includes CoreAnimation, SceneKit, etc).
you need to swap in OpenGLES.framework from Xcode 9b3
As a temporary workaround you can copy libCoreVMClient.dylib from Beta 3 into the Xcode 9 GM and xcode 9.0.1
For iOS this is located at:
Xcode[-beta].app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/OpenGLES.framework/libCoreVMClient.dylib
For tvOS this is located at:
Xcode[-beta].app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/tvOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/OpenGLES.framework/libCoreVMClient.dylib
For watchOS this is located at:
Xcode[-beta].app/Contents/Developer/Platforms/WatchOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/watchOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/OpenGLES.framework/libCoreVMClient.dylib
Please check below link:
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