hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

mdonkers

#!/usr/bin/env python3
"""
License: MIT License
Copyright (c) 2023 Miel Donkers

Very simple HTTP server in python for logging requests
Usage::
    ./server.py [<port>]
"""
from http.server import BaseHTTPRequestHandler, HTTPServer

ageis

security and hardening options for systemd service units

A common and reliable pattern in service unit files is thus:

NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
DevicePolicy=closed
ProtectSystem=strict

jasonrudolph

5 entertaining things you can find with the GitHub Search API

Let's have some command-line fun with curl, [jq][1], and the [new GitHub Search API][2].

Today we're looking for:

• The hottest repositories created in the last week.
• The oldest user accounts with zero followers. (So sad.)
• Issue trends by language.
• Clojure projects defying convention.

JosefJezek

How to use Pelican on GitHub Pages

Author: Josef Jezek

Install on Ubuntu

Installing Python tools

sudo apt-get install python-setuptools

ryanflorence

var http = require("http"),
    url = require("url"),
    path = require("path"),
    fs = require("fs")
    port = process.argv[2] || 8888;

http.createServer(function(request, response) {

  var uri = url.parse(request.url).pathname
    , filename = path.join(process.cwd(), uri);

panzi

// "License": Public Domain
// I, Mathias Panzenböck, place this file hereby into the public domain. Use it at your own risk for whatever you like.
// In case there are jurisdictions that don't support putting things in the public domain you can also consider it to
// be "dual licensed" under the BSD, MIT and Apache licenses, if you want to. This code is trivial anyway. Consider it
// an example on how to get the endian conversion functions on different platforms.

#ifndef PORTABLE_ENDIAN_H__
#define PORTABLE_ENDIAN_H__

#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)

phiresky

# vim: set ft=python:

# see the README at https://gist.github.com/phiresky/4bfcfbbd05b3c2ed8645
# source: https://github.com/mpv-player/mpv/issues/2149
# source: https://github.com/mpv-player/mpv/issues/566
# source: https://github.com/haasn/gentoo-conf/blob/nanodesu/home/nand/.mpv/filters/mvtools.vpy

import vapoursynth

core = vapoursynth.get_core()

andrejbauer

dmglab

---

Note: this is a summary of different git workflows putting together to a small git bible. references are in between the text

---

How to Branch

try to keep your hacking out of the master and create feature branches. the [feature-branch workflow][4] is a good median between noobs (i have no idea how to branch) and git veterans (let's do some rocket sience with git branches!). everybody get the idea!

Basic usage examples