Mobile is the new PC and AArch64 is the new x64
kinke
noone at nowhere.com
Tue Nov 13 22:39:34 UTC 2018
On Tuesday, 13 November 2018 at 17:41:31 UTC, Joakim wrote:
> No, benchmarks show the mobile i7 in last year's MBP as faster
> than your old desktop core i5, so the iPad Pro is faster than
> your desktop. :P Of course, the TDP of your desktop i5 is twice
> the mobile i7 and almost 10 times the A12X in the new iPad Pro,
> so Apple completely blows away Intel on the
> performance-to-power-dissipation ratio.
While the last statement may hold some truth, I sure as hell
don't trust Geekbench numbers. And all ARM/x86 comparisons seem
to be based on that one little, highly controversial benchmark
suite.
Their multicore results suggest a Ryzen 1950X outperforms an i7
7700K by only 50%. A small testsuite of 8 real-world apps (incl.
raytracing, video encoding, compression) shows a min gain of 80%
and max gain of 200%, definitely averaging above 100%:
https://www.computerbase.de/2018-08/amd-ryzen-threadripper-2990wx-2950x-test/2/#diagramm-blender-280
As with any benchmark, your milage may vary, but a dedicated
multicore score apparently not scaling well at all makes me
wonder.
Unless someone gives me hard numbers that their phone/tablet can
compile something like LLVM/LDC in a time anywhere near their
desktop CPU, I don't waste a second believing that a ~5W CPU can
match a 65+ W desktop one, even a 5-years old one like mine.
Laptops would surely already be shipping with these chips if that
was the case.
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