RuntimeDeviceTracker DeepyCopy is better optimized.
The DeepCopy method is used when a ScopedGlobalRuntimeDeviceTracker is constructed. This in turn causes the rebuilding of the device names and states which isn't a free operation. Now we copy the already computed information. This was noticeable when using ArrayHandleTransform since it uses ScopedGlobalRuntimeDeviceTracker when construction host side portals.
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