There are ChaCha20 SIMD implementations / optimizations for x86, ARM, MIPS and possibly others: - https://patchwork.kernel.org/project/linux-crypto/cover/20181

There are ChaCha20 SIMD implementations / optimizations for x86, ARM, MIPS and possibly others: - https://patchwork.kernel.org/project/linux-crypto/cover/20181111093630.28107-1-martin@strongswan.org/ https://patchwork.kernel.org/project/linux-crypto/cover/2018... - https://patchwork.kernel.org/project/linux-crypto/patch/20180831080140.20553-1-ebiggers@kernel.org/ https://patchwork.kernel.org/project/linux-crypto/patch/2018... - https://patchwork.kernel.org/project/linux-crypto/patch/20191002141713.31189-6-ard.biesheuvel@linaro.org/ https://patchwork.kernel.org/project/linux-crypto/patch/2019...