James Yang futurist

What is Critical Rendering Path

The Critical Rendering Path is the sequence of steps the browser goes through to convert the HTML, CSS and JavaScript into actual pixels on the screen. If we can optimize the critical rendering path, we can make our pages faster.

Constructing the DOM

When you type an URL and hit enter, the browser sends a request to the server. The server returns a response with the HTML to the browser, which somehow needs to convert the markup into something that we can see on the screen.

The browser follows a well defined set of steps and it all starts with processing the HTML and building the DOM.

Remove Sendmail from Ubuntu

This should help you completely uninstall Sendmail and all that comes with it.

First, stop the service (assuming it's running).

sudo /etc/init.d/sendmail stop

Uninstall sendmail and sendmail-bin

	const random = +new Date()
	export default {
	selector: function(sel) {
	let match = /^\s@keyframes (.)$/i.exec(sel)
	return match ? '@keyframes ' + match[1].trim() + random : sel
	},
	value: function(val, key) {
	return key=='animateName' ? val + random : val
	}
	}

	#!/bin/sh
	MODE=`/usr/bin/pmset -g \| awk '/hibernatemode/ { print $2 }'`
	LEFT=`/usr/bin/pmset -g batt \| grep Internal \| awk '{ print $2 }' \| awk -F % '{ print $1 }'`

	if [ $LEFT -lt 30 ] && [ $MODE != 3 ] ; then
	{
	/usr/bin/logger -t "hibernatemode" "Battery level less than 30%; setting hibernatemode to 3"
	/usr/bin/pmset -a hibernatemode 3
	}
	elif [ $LEFT -gt 50 ] && [ $MODE != 0 ]; then

	# alias for git

	alias ga='git add'
	alias ga.='git add .'
	alias gaa='git add -A'
	alias gs='git status'
	alias gp='git push'
	alias gm='git commit'
	alias gmm='git commit -m'
	alias gl='git log --all --decorate --graph'

	# activate application "Finder"
	set l to {}
	tell application "Finder" to repeat with f in (get selection)
	set end of l to POSIX path of (f as alias)
	end repeat
	set text item delimiters to linefeed
	set the clipboard to (l as text)

	# activate application "Finder"

	tell application "Finder" to repeat with f in (get selection)
	set p to POSIX path of (f as alias)
	do shell script "/Applications/Emacs.app/Contents/MacOS/bin/emacsclient -n -f '/tmp/emacsserver/server' " & quoted form of p
	end repeat

	LOADING=false

	usage()
	{
	cat << EOF
	usage: $0 [options] dbname

	OPTIONS:
	-h Show this help.
	-l Load instead of export

	#!/bin/bash

	LOADING=false
	DEBUG=/dev/null

	usage()
	{
	cat << EOF
	usage: $0 [options] <DBNAME>

	var detectBackOrForward = function(onBack, onForward) {
	hashHistory = [window.location.hash];
	historyLength = window.history.length;

	return function() {
	var hash = window.location.hash, length = window.history.length;
	if (hashHistory.length && historyLength == length) {
	if (hashHistory[hashHistory.length - 2] == hash) {
	hashHistory = hashHistory.slice(0, -1);
	onBack();