To slow on ryzen 9

[Former user]

X265 is to slow on ryzen. Optimization vor AMD is important. Like on a ryzen 9 3900x

[Anime4000]

I tested in my Ryzen 3950X, x265 3.2 stable handle all 16 Cores 32 Threads neatly.
x265 v3.2 stable, 10-bit, medium preset, psnr, 4K:
GCC 9.3.0, Zen 2 optimization.

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I use this compile script for Zen 2 architecture:

#!/bin/sh

# This script for building x265 for Internet Friendly Media Encoder
# Make a new folder under "x265/build/msys2"

# This script will run under MSYS2 (https://www.msys2.org/)
# with complete development package, GCC 9.3.0:
# pacman -S --needed base-devel git subversion mercurial nasm yasm mingw-w64-x86_64-toolchain mingw-w64-x86_64-cmake mingw-w64-x86_64-qt5

# MSYS2 have problem with CMake and HG to get version, this script will make .hg_archival.txt by tricking CMake
HG_ARCHIVAL="../../.hg_archival.txt"

if [ ! -f "$HG_ARCHIVAL" ]; then
    REPO=`hg log -r. --template {node}`
    NODE=`hg log -r. --template {node}`
    BRANCH=`hg log -r. --template {branch}`
    TAG=`hg log -r. --template {latesttag}`
    DISTANCE=`hg log -r. --template {latesttagdistance}`

    echo -e repo: ${REPO} > $HG_ARCHIVAL
    echo -e node: ${NODE:0:12} >> $HG_ARCHIVAL
    echo -e branch: ${BRANCH} >> $HG_ARCHIVAL
    echo -e tag: ${TAG}+${DISTANCE}_ifme-znver2 >> $HG_ARCHIVAL
    echo -e distance: ${DISTANCE} >> $HG_ARCHIVAL
fi

# 8bit
cmake -G "MSYS Makefiles" -DCMAKE_AR=/mingw64/bin/ar -DCMAKE_BUILD_TYPE=RELEASE -DCMAKE_C_FLAGS_RELEASE="-O3 -DNDEBUG -march=znver2 -static" -DCMAKE_CXX_FLAGS_RELEASE="-O3 -DNDEBUG -march=znver2 -static" ../../source -DENABLE_SHARED=OFF -DSTATIC_LINK_CRT=ON -DENABLE_CLI=ON -DHIGH_BIT_DEPTH=OFF -DMAIN12=OFF
make
mv x265.exe x265-08.exe

# 10bit
cmake -G "MSYS Makefiles" -DCMAKE_AR=/mingw64/bin/ar -DCMAKE_BUILD_TYPE=RELEASE -DCMAKE_C_FLAGS_RELEASE="-O3 -DNDEBUG -march=znver2 -static" -DCMAKE_CXX_FLAGS_RELEASE="-O3 -DNDEBUG -march=znver2 -static" ../../source -DENABLE_SHARED=OFF -DSTATIC_LINK_CRT=ON -DENABLE_CLI=ON -DHIGH_BIT_DEPTH=ON -DMAIN12=OFF
make
mv x265.exe x265-10.exe

# 12bit
cmake -G "MSYS Makefiles" -DCMAKE_AR=/mingw64/bin/ar -DCMAKE_BUILD_TYPE=RELEASE -DCMAKE_C_FLAGS_RELEASE="-O3 -DNDEBUG -march=znver2 -static" -DCMAKE_CXX_FLAGS_RELEASE="-O3 -DNDEBUG -march=znver2 -static" ../../source -DENABLE_SHARED=OFF -DSTATIC_LINK_CRT=ON -DENABLE_CLI=ON -DHIGH_BIT_DEPTH=ON -DMAIN12=ON
make
mv x265.exe x265-12.exe

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