hash-speedtest

default.nix

{ pkgs ? import <nixpkgs> {} }:
let
    libkcapi = pkgs.stdenv.mkDerivation {
        pname = "libkcapi";
        version = "a05976bef9c4d4dbe48323e8cdbe2c886f35b9ff";
        src = pkgs.fetchFromGitHub {
            repo = "libkcapi";
            owner = "smuellerDD";
            rev = "a05976bef9c4d4dbe48323e8cdbe2c886f35b9ff";
            sha256 = "sha256-TjTER1AiPyILOx+oyZmt0WSPxEMo0oP+dAYZK6O3BM4=";
        };
        nativeBuildInputs = [ pkgs.autoreconfHook ];
        configureFlags = [ "--enable-kcapi-hasher" ];
    };

    btrfs-progs = pkgs.btrfs-progs.overrideAttrs (old: {
        buildInputs = old.buildInputs ++ [ libkcapi ];
        configureFlags = old.configureFlags ++ [ "--with-crypto=libkcapi" ];
        postBuild = (old.postBuild or "") + ''
            make hash-speedtest
        '';
        postInstall = (old.postInstall or "") + ''
            cp hash-speedtest $out/bin
        '';
    });
in btrfs-progs

results - razer blade stealth 2016.txt

Block size:     4096
Iterations:     100000
Implementation: libkcapi
Units:          CPU cycles

    NULL-NOP: cycles:     23156060, cycles/i      231
 NULL-MEMCPY: cycles:     48894774, cycles/i      488,    20672.836 MiB/s
      CRC32C: cycles:    152103176, cycles/i     1521,     6645.493 MiB/s
      XXHASH: cycles:    110446886, cycles/i     1104,     9151.921 MiB/s
      SHA256: cycles:   5455381428, cycles/i    54553,      185.286 MiB/s
      BLAKE2: cycles:   2412114586, cycles/i    24121,      419.054 MiB/s
      
      
Block size:     4096
Iterations:     100000
Implementation: builtin
Units:          CPU cycles

    NULL-NOP: cycles:     25276646, cycles/i      252
 NULL-MEMCPY: cycles:     49015106, cycles/i      490,    20622.684 MiB/s
      CRC32C: cycles:    152226114, cycles/i     1522,     6640.306 MiB/s
      XXHASH: cycles:    110294130, cycles/i     1102,     9164.827 MiB/s
      SHA256: cycles:   8371201420, cycles/i    83712,      120.751 MiB/s
      BLAKE2: cycles:   1565432874, cycles/i    15654,      645.718 MiB/s