jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

santisbon

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isaacs

# Hello, and welcome to makefile basics.
#
# You will learn why `make` is so great, and why, despite its "weird" syntax,
# it is actually a highly expressive, efficient, and powerful way to build
# programs.
#
# Once you're done here, go to
# http://www.gnu.org/software/make/manual/make.html
# to learn SOOOO much more.

veekaybee

Anti-hype LLM reading list

Goals: Add links that are reasonable and good explanations of how stuff works. No hype and no vendor content if possible. Practical first-hand accounts of models in prod eagerly sought.

Foundational Concepts

Pre-Transformer Models

IgnoredAmbience

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<!--
Noto Mono + Color Emoji Font Configuration.

Currently the only Terminal Emulator I'm aware that supports colour fonts is Konsole.

Usage:
0. Ensure that the Noto fonts are installed on your machine.
1. Install this file to ~/.config/fontconfig/conf.d/99-noto-mono-color-emoji.conf

jimmychu0807

use std::str;

fn main() {
  // -- FROM: vec of chars --
  let src1: Vec<char> = vec!['j','{','"','i','m','m','y','"','}'];
  // to String
  let string1: String = src1.iter().collect::<String>();
  // to str
  let str1: &str = &src1.iter().collect::<String>();
  // to vec of byte

gmcclins

#!/usr/bin/env bash
#
# script to stop vagrant box for use with systemd
# place scripts into /usr/lib/systemd/scripts/
# be sure to put the .service file in /lib/systemd/system/
#
# -- Geoffrey McClinsey

VAGRANTUSR=vagrant      # user you want vagrant box to run as
VAGRANTBOXPATH=         # add path to Vagrantfile

ipan

jq will sort (-S) the whole file (.) and compare STDOUT (<()) with diff

diff <(jq -S . A.json) <(jq -S . B.json)

https://stackoverflow.com/questions/31930041/using-jq-or-alternative-command-line-tools-to-diff-json-files

chrisroos

Every so often I have to restore my gpg keys and I'm never sure how best to do it. So, I've spent some time playing around with the various ways to export/import (backup/restore) keys.

Method 1

Backup the public and secret keyrings and trust database

cp ~/.gnupg/pubring.gpg /path/to/backups/
cp ~/.gnupg/secring.gpg /path/to/backups/
cp ~/.gnupg/trustdb.gpg /path/to/backups/

or, instead of backing up trustdb...

gnuvince

Introduction

In the fourth chapter of “Programming Pearls”, Jon Bentley discusses program correctness and tells us that as part of some of his programming classes, he asks the attendees to implement the binary search algorithm. Although simple in appearance (“look at the middle element, if it’s the target terminate, if it’s smaller look in the upper half, otherwise look in the lower half”), it can be a surprisingly tricky algorithm to implement. He cites TAoCP Vol. 3 wherein Don Knuth mentions that although the first paper on binary