Dan Bostonweeks danimal

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.
Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

	# Disallow the Amazon AI bot.
	User-agent: Amazonbot
	Disallow: /

	# Disallow the Anthropic AI bot.
	User-agent: anthropic-ai
	Disallow: /

	# Disallow the Apple Intelligence bot.
	User-Agent: Applebot

	.onDrop(of: [.fileURL], isTargeted: nil) { providers in
	if let loadableProvider = providers.first(where: { $0.canLoadObject(ofClass: URL.self) }) {
	_ = loadableProvider.loadObject(ofClass: URL.self) { fileURL, _ in
	if let fileURL = fileURL, fileURL.pathExtension.lowercased() == "zip" {
	self.logger.info("Dropped \(fileURL.path)")
	DispatchQueue.main.async {
	importer.open(zipArchiveURL: fileURL)
	}
	}
	}

-#! /bin/bash
-# Information came from https://apple.stackexchange.com/questions/358651/unable-to-completely-uninstall-zoom-meeting-app
-# I just added more stuff to delete so there is no manual stuff to execute.
-echo Zoom cleanup 🧹
-echo Cleaning Application Cached Files...
-sudo rm -rf ~/Library/Application\ Support/zoom.us
-sudo rm -fr ~/Library/Application\ Support/ZoomPresence
-echo Cleaning Application...

	# Builds a Libjpeg framework for the iPhone and the iPhone Simulator.
	# Creates a set of universal libraries that can be used on an iPhone and in the
	# iPhone simulator. Then creates a pseudo-framework to make using libjpeg in Xcode
	# less painful.
	#
	# To configure the script, define:
	# IPHONE_SDKVERSION: iPhone SDK version (e.g. 8.1)
	#
	# Then go get the source tar.bz of the libjpeg you want to build, shove it in the
	# same directory as this script, and run "./libjpeg.sh". Grab a cuppa. And voila.

	//
	// KeyboardListener.swift
	//
	// Created by Patrick B. Gibson on 7/16/16.
	//

	import UIKit

	protocol KeyboardListener: AnyObject {
	var view: UIView! { get }

	#!/bin/sh

	defaults read com.apple.finder CreateDesktop > /dev/null 2>&1
	enabled=$?

	if [ "$1" = "off" ]; then
	if [ $enabled -eq 1 ]; then
	defaults write com.apple.finder CreateDesktop false
	osascript -e 'tell application "Finder" to quit'
	open -a Finder

	#!/bin/sh

	TRASH="$HOME/.Trash/";

	args=("$@");

	for f in $args; do
	base=$(basename $f);
	if [ -e "$TRASH$base" ] ; then
	TS=`date`;

	@objc class ExampleTableCell: UITableViewCell, ReuseableObject, NibLoadable {}


	@objc class ExampleViewController: UITableViewController {
	required init?(coder aDecoder: NSCoder) {
	fatalError("init(coder:) has not been implemented")
	}


	override init(style: UITableViewStyle) {

	//
	// Created by Nick Vance on 12/4/15.
	// Copyright © 2015 ToWatchList. All rights reserved.
	//

	import AVKit
	import XCDYouTubeKit
	import TVMLKit

	class YTPlayerViewController: AVPlayerViewController, AVPlayerViewControllerDelegate {