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The performance is ridiculously slow with ROCm 2.3, though kernels compile the same as the pro drivers
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System Information
Operating system: Linux-4.15.0-47-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: Radeon RX Vega ATI Technologies Inc. 4.5.13542 Core Profile Context

Blender Version
Broken: (example: 2.80, 860a9f979d60, master, 2018-04-14, as found on the splash screen)
Short description of error
The performance is ridiculously slow with ROCm 2.3 kernels, though they compile even at the same speed as the pro drivers. Not sure if report this to ROCm's project page too, it's compiling after all.

Exact steps for others to reproduce the error

Event Timeline

The situation is still the same, we only support amdgpu-pro. If we make an effort to support this we can look into optimizations, but it's not a good use of or time when the ROCm compiler is not mature yet for this kind of use case.