Rafayel Hovhannisyan hosembafer

Web Image Performance Optimization Guidelines

Images make up 42% of an average web page's total weight.

Image format

Image files should be formatted as WebP (next-gen format) or PNG formats, don't use JPG/JPEG as it can't maintain quality properly.

Prefer WebP (next-gen format) over PNG, use PNG only in particular cases when size/quality is better with PNG.

I heard some points of criticism to how React deals with reactivity and it's focus on "purity". It's interesting because there are really two approaches evolving. There's a mutable + change tracking approach and there's an immutability + referential equality testing approach. It's difficult to mix and match them when you build new features on top. So that's why React has been pushing a bit harder on immutability lately to be able to build on top of it. Both have various tradeoffs but others are doing good research in other areas, so we've decided to focus on this direction and see where it leads us.

I did want to address a few points that I didn't see get enough consideration around the tradeoffs. So here's a small brain dump.

"Compiled output results in smaller apps" - E.g. Svelte apps start smaller but the compiler output is 3-4x larger per component than the equivalent VDOM approach. This is mostly due to the code that is usually shared in the VDOM "VM" needs to be inlined into each component. The tr

Dependency Injection in Functional Programming

There exist several DI frameworks / libraries in the Scala ecosystem. But the more functional code you write the more you'll realize there's no need to use any of them.

A few of the most claimed benefits are the following:

Dependency Injection.
Life cycle management.
Dependency graph rewriting.

	import React from 'react';
	import {withRouter} from 'react-router-dom';
	import PropTypes from 'prop-types';

	/**
	* A replacement component for the react-router `Prompt`.
	* Allows for more flexible dialogs.
	*
	* @example
	* <NavigationPrompt when={this.props.isDirty}>

	Name: Flash
	Serial: eNrzzU/OLi0odswsqnHLSSzOqDGoca7JKCkpsNLXLy8v1ytJTczVLUotKNFLzs8FAJHYETc=

	if anyone wants to thank ETH: 0x527c2aB55b744D6167dc981576318af96ed26676
	Thank you!

	---
	METHOD 1

	This should roughly sort the items on distance in MySQL, and should work in SQLite.
	If you need to sort them preciser, you could try using the Pythagorean theorem (a^2 + b^2 = c^2) to get the exact distance.
	---
	SELECT *
	FROM table
	ORDER BY ((lat-$user_lat)(lat-$user_lat)) + ((lng - $user_lng)(lng - $user_lng)) ASC



	var fs = require('fs');
	var path = require('path');

	var markup = fs.readFileSync('sprite.svg').toString();
	var lines = markup.split(/\n/g);
	var symbols = {};
	var currentSymbol = null;

	var audioCtx = new (window.AudioContext \|\| window.webkitAudioContext)();
	var streamNode;
	var masterNode;
	var bypassNode;
	var delayNode;
	var feedbackNode;

	//request an audio MediaStream track and save a reference to it
	navigator.mediaDevices.getUserMedia({audio: true})
	.then(stream => {

	# Installing
	qemu-system-x86_64 -bios /usr/share/ovmf/ovmf_x64.bin -enable-kvm -cpu host -smp 4 -m 2048 -cdrom ~/Downloads/Win10_English_x64.iso -net nic,model=virtio -net user -drive file=~/vm/win10.hd.img.raw,format=raw,if=virtio -vga qxl -drive file=~/Downloads/virtio-win-0.1.105.iso,index=1,media=cdrom

	# Running
	qemu-system-x86_64 -bios /usr/share/ovmf/ovmf_x64.bin -enable-kvm -cpu host -smp 4 -m 4096 -net nic,model=virtio -net user -drive file=~/vm/win10.hd.img.raw,format=raw,if=virtio -vga qxl -usbdevice tablet -rtc base=utc