Corentin Kerisit cerisier

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

If you enjoyed reading this, I'm intending to do more blogging like this over here: https://cdgd.tech

This is not a complaint about Webpack or v4 in any way. This is just a record of my process trying it out so I could provide feedback to the webpack team

Hmm... I don't see any docs for 4.0 on https://webpack.js.org. I guess I'll just wing it. All I need to do is npm i -D webpack@next, right?

+ webpack@4.0.0-beta.2

This is the process I followed on my Fedora 23 host machine to build a small/minimal vanilla Linux kernel and test in Qemu (based on this blog post). This will provide a safe sandbox in which to test kernel changes, and is generally faster than developing natively on the host machine. Qemu will boot the kernel image directly in the emulated system.

Install required build tools on host machine

sudo dnf install ncurses-devel kernel-devel kernel-headers gcc gcc-c++ git qemu openssl-devel glibc-static

	#! /bin/bash -e
	#
	# clean up everything in CACHE_DIR last accessed more than DAYS days ago.
	# also removes files with bogus timestamps in the future.
	#
	# -----------------------------------------------------------------------
	# Copyright 2021 Todd Derr (todd.derr@gmail.com)
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.

	# Go to "Activate Google Cloud Shell" in https://console.cloud.google.com/home.
	echo '[{"origin": ["*"],"responseHeader": ["Content-Type"],"method": ["GET", "HEAD"],"maxAgeSeconds": 3600}]' > cors-config.json

	# If you want to restrict the access one or more specific domains, add their URL to the array:
	echo '[{"origin": ["https://yourdomain.com"],"responseHeader": ["Content-Type"],"method": ["GET", "HEAD"],"maxAgeSeconds": 3600}]' > cors-config.json

	# Set CORS config.
	gsutil cors set cors-config.json gs://YOUR_BUCKET_NAME

	# Verify if everything is OK.

	// Zipping.swift
	// known-good: Swift 4.2
	// Alexis Gallagher

	import Foundation

	public extension URL {

	/// Creates a zip archive of the file or folder represented by this URL and returns a references to the zipped file
	///

	import android.annotation.SuppressLint
	import android.os.Parcelable
	import kotlinx.android.parcel.Parcelize

	@SuppressLint("ParcelCreator") // IntelliJ Issue https://youtrack.jetbrains.com/issue/KT-19300
	@Parcelize
	data class Movie(val title: String) : Parcelable

	Hi All!

	I've recently launched a tool that wraps many of the commands here with a user interface. This desktop application is currently available for macOS. There's a roadmap outlining planned features for the near future.
	Feel free to request any features you'd like to see, and I'll prioritize them accordingly.
	One of the most important aspects of this application is that every command executed behind the scenes is displayed in a special log section. This allows you to see exactly what’s happening and learn from it.

	Here's the link to the repository: https://github.com/Pulimet/ADBugger

	App Description:
	ADBugger is a desktop tool designed for debugging and QA of Android devices and emulators. It simplifies testing, debugging, and performance analysis by offering device management, automated testing, log analysis, and remote control capabilities. This ensures smooth app performance across various setups.

Corentin Kerisit cerisier

libdispatch efficiency tips

If you enjoyed reading this, I'm intending to do more blogging like this over here: https://cdgd.tech

This is not a complaint about Webpack or v4 in any way. This is just a record of my process trying it out so I could provide feedback to the webpack team

Table of contents

Install required build tools on host machine

Prepare a working space for kernel development

	<configuration>
	<property>
	<name>fs.s3a.access.key</name>
	<description>AWS access key ID. Omit for Role-based authentication.</description>
	<value>YOUR_ACCESS_KEY</value>
	</property>

	<property>
	<name>fs.s3a.secret.key</name>
	<description>AWS secret key. Omit for Role-based authentication.</description>