As an almost universal rule of thumb, there is no perfect simulator/emulator substitute for a target hardware platform.
For example, the iOS Simulator runs in an x86 environment. There's no way to throttle it to run at hardware spec speeds, never mind that the Safari in Simulator is quite possibly running different code than the Safari that ships on the devices themselves.
For example, the iOS Simulator runs in an x86 environment. There's no way to throttle it to run at hardware spec speeds, never mind that the Safari in Simulator is quite possibly running different code than the Safari that ships on the devices themselves.