[Mesa-dev] Let's identify the R9 285 bottleneck in respect to R7 370

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Hello.

The result file at
http://openbenchmarking.org/result/1606180-PTS-MIDJUNEA78 is showing
multiple issues, some of them are:

[Minor issue] Kernel 4.7.0-999-generic (x86_64) 20160616 has a
performance regression on R9 290

[Major issue] R7 370 yields 133 FPS in Tesseract, while R9 285
unexpectedly yields 111.81 FPS in Tesseract

R7 370: 1996.8 GFLOPS
R9 285: 3290 GLOPS

I would like this forum thread to identify the cause of the major
issue. So the question is:

*** What might be causing R9 285 to perform worse than R7 370? ***

(I don't have access to R7 370 nor R9 285. My current answer to the
question is: I don't know.)