andyvanee

How slow is async/await?

TL;DR - incredibly slow!

Motivation

I was working on some "framework" type code, where it often makes sense to provide wrappers where the framework accepts a user-defined callback. The sensible default is to accept an async callback since you don't know when the user might need to do any disk/network/etc calls which require an async wrapper.

andyvanee

/*
 * Actually minimal scanvideo example
 */

#include <stdio.h>

#include "pico.h"
#include "pico/scanvideo.h"
#include "pico/scanvideo/composable_scanline.h"
#include "pico/stdlib.h"

andyvanee

hs.hotkey.bind({"cmd", "alt", "ctrl"}, "R", function() hs.reload() end)
hs.alert.show("Config loaded")

-- Fullscreen
hs.hotkey.bind({"cmd", "alt"}, "1",
  function()
    local window, screen = getFocusedWindowAndScreen()
    window.w = screen.w
    window.x = screen.x
    window.y = screen.y

andyvanee

Problem

Google search has gotten objectively worse with increasing crawling, SEO farming and AI generated bullshit. I believe the only sane solution is to explicitly whitelist websites with known ethical publishing guidelines. I am going to attempt to build a list of sites that I trust for common search contexts.

Developer Results

General search (not focused on a specific technology):

andyvanee

Arts/Culture

• The Anthropocene Reviewed
• Life Kit (NPR)
• Dear Hank & John
• On Being with Krista Tippet
• A Slight Change of Plans with Maya Shankar
• Factually! with Adam Conover
• Philosophize This!
• No Such Thing As A Fish

andyvanee

The documentation on Directus 9 extensions is scarce. This is a slightly more detailed implementation than the example given.

Notes:

• router is an express.Router object
• services is a bunch of getters of available services (see below)
• database is the knex instance
• directus.auth.refresh() will throw. It's assumed that the user has authenticated in before calling fetchJson

andyvanee

Basic profiler for your node scripts

Usage

import "./profile.js"

// do some stuff...
const items = [...new Array(100)].map((x, i) => i)
for (let i of items) {

andyvanee

GoDaddy + LetsEncrypt Certificate Installation

Valid as of September 2020

note: if you have shell access and want to automatically renew, follow the steps on this page instead

Much of the current documentation on this from LetsEncryt and Godaddy suggests that this is a very hard thing to do - but I'm okay with spending 10 minutes every 2-3 months for a free, quality SSL certificate. If you are too, here's how I do it.

andyvanee

import fs from "fs"
import crypto from "crypto"
import path from "path"

/**
 * Calculate the checksum of a directory of files
 */
const dirsum = async basepath => {
    const hash = crypto.createHash("sha1")
    const dirOpts = { withFileTypes: true }

andyvanee

import { directive } from "https://unpkg.com/@polymer/lit-element/lit-element.js?module"

const stateMap = new WeakMap()

export const tagProps = directive((tag, props = {}) => part => {
    let state = stateMap.get(part)
    const el = () => document.createElement(tag)
    if (state === undefined) {
        state = { tag, element: el() }
        stateMap.set(part, state)