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On my i5 3450S (with enhanced turbo) x265 4K encoding speed was 1.06.
For curiosity I changed x265 to VS 2017 AVX version and the speed was 1.11. Then I used VS 2017 AVX PGO version and the speed was 1.15 (I added only '-v warning' to ffmpeg part to cleaner output).
Then I go to the decoding -- with included in benchmark ffmpeg the speed was 48 to 49, with Zeranoe ffmpeg 2017-04-11 it was 64, with compiled by GCC 7 today snapshot the speed was 66.
The speed difference in x265 encoding is normal, but it is surprising big difference in decoding speed.
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