oconnor663

#! /usr/bin/python3

import sys
from hashlib import sha256


def ten_digits_from_u64(n):
    assert len(str(2**64)) == 20
    assert n < 2**64
    s = "{:020}".format(n)

oconnor663

   Compiling cc v1.0.55
   Compiling example v0.1.0 (/home/jacko/tmp/sanitizer_example)
warning: src/oops.c:5:12: warning: address of stack memory associated with local variable 'local_array' returned [-Wreturn-stack-address]
warning:     return local_array;
warning:            ^~~~~~~~~~~
warning: 1 warning generated.
error: linking with `cc` failed: exit code: 1
  |
  = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/home/jacko/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/home/jacko/tmp/sanitizer_example/target/debug/deps/example-9c8dfc3293cab709.29uisxezum6f4udt.rcgu.o" "/home/jacko/tmp/sanitizer_example/target/debug/deps/example-9c8dfc3293cab709.2hvzw3qk092jmz19.rcgu.o" "/home/jacko/tmp/sanitizer_example/target/debug/deps/example-9c8dfc3293cab709.2vwfxc7xli1op523.rcgu.o" "/home/jacko/tmp/sanitizer_example/target/debug/deps/example-9c8dfc3293cab709.2ymvkyqxyu1kfubm.rcgu.o" "/home/jacko/tmp/sanitizer_example/target/debug/deps/example-9c8dfc32

oconnor663

A micro-optimization of the POWER build described as described by
Themris in https://imgur.com/gallery/xoBunR9. Disclaimer, I haven't
played the Triforce all the way through yet, so I'm making a lot of this
up / leaning on the original guide. Also a mild *item spoiler* below.

Observations:

1. The choice of Simulacrum at level 6 is a weak point in the POWER
   build. COURAGE and WISDOM retain it in their final builds, but POWER
   is going to drop it just 3 levels later.

oconnor663

C:\Users\Jack\pyo3\examples\word-count>cargo +nightly build --release
   Compiling proc-macro2 v1.0.9
   Compiling unicode-xid v0.2.0
   Compiling syn v1.0.16
   Compiling autocfg v1.0.0
   Compiling lazy_static v1.4.0
   Compiling cfg-if v0.1.10
   Compiling semver-parser v0.7.0
   Compiling memchr v2.3.3
   Compiling scopeguard v1.1.0

oconnor663

#! /usr/bin/env python3

import hashlib
import threading


def hash_buf(buf):
    return hashlib.sha256(buf).hexdigest()

oconnor663

package main

import (
	"encoding/hex"
	"fmt"
	"io"
	"os"

	"github.com/zeebo/blake3"
)

oconnor663

# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 3.2.1 present.
# SMBIOS implementations newer than version 3.2.0 are not
# fully supported by this version of dmidecode.

Handle 0x0052, DMI type 16, 23 bytes
Physical Memory Array
	Location: System Board Or Motherboard
	Use: System Memory

oconnor663

fn ticks() -> u64 {
    let mut discard = 0;
    unsafe { core::arch::x86_64::__rdtscp(&mut discard) }
}

fn main() {
    let t0 = std::time::Instant::now();
    let c0 = ticks();
    std::thread::sleep(std::time::Duration::from_secs(1));
    let t1 = std::time::Instant::now();

oconnor663

#include <sodium.h>
#include <stdio.h>
#include <unistd.h>

int main() {
  if (sodium_init() < 0) {
      printf("init error\n");
      return 1;
  }
  unsigned char hash[crypto_generichash_BYTES];

oconnor663

AWS t3.nano (AVX-512)
=====================

# baokeshed
test bench_compress64_portable    ... bench:         117 ns/iter (+/- 4) = 1094 MB/s
test bench_compress_portable      ... bench:          84 ns/iter (+/- 3) = 761 MB/s
test bench_compress_sse41         ... bench:          69 ns/iter (+/- 2) = 927 MB/s
test bench_fficompress64_portable ... bench:         105 ns/iter (+/- 2) = 1219 MB/s
test bench_fficompress_avx512     ... bench:          59 ns/iter (+/- 1) = 1084 MB/s
test bench_fficompress_portable   ... bench:          93 ns/iter (+/- 4) = 688 MB/s