nikic

Why objects (usually) use less memory than arrays in PHP

This is just a small post in response to [this tweet][tweet] by Julien Pauli (who by the way is the release manager for PHP 5.5). In the tweet he claims that objects use more memory than arrays in PHP. Even though it can be like that, it's not true in most cases. (Note: This only applies to PHP 5.4 or newer.)

The reason why it's easy to assume that objects are larger than arrays is because objects can be seen as an array of properties and a bit of additional information (like the class it belongs to). And as array + additional info > array it obviously follows that objects are larger. The thing is that in most cases PHP can optimize the array part of it away. So how does that work?

The key here is that objects usually have a predefined set of keys, whereas arrays don't:

ragingwind

Backend Architectures

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

• Introduce Gizzard of Twitter - 트위터의 새로운 분산 관리 라이브러리 Gizzard를 소개합니다.
• The Architecture Twitter Uses to Deal with 150M Active Users, 300K QPS, a 22 MB/S Firehose, and Send Tweets in Under 5 Seconds
• Scaling Twitter: Making Twitter 10000 Percent Faster

supermarin

INSERT INTO 'snippets' ('title', 'body') VALUES
    (':+1:', '👍'),
    (':-1:', '👎'),
    (':100:', '💯'),
    (':1234:', '🔢'),
    (':8ball:', '🎱'),
    (':a:', '🅰'),
    (':ab:', '🆎'),
    (':abc:', '🔤'),
    (':abcd:', '🔡'),

joemaller

#!/bin/bash
# Add Vagrant's NFS setup commands to sudoers, for `vagrant up` without a password
# Updated to work with Vagrant 1.3.x

# Stage updated sudoers in a temporary file for syntax checking
TMP=$(mktemp -t vagrant_sudoers)
cat /etc/sudoers > $TMP
cat >> $TMP <<EOF

# Allow passwordless startup of Vagrant when using NFS.

XVilka

THIS GIST WAS MOVED TO TERMSTANDARD/COLORS REPOSITORY.

PLEASE ASK YOUR QUESTIONS OR ADD ANY SUGGESTIONS AS A REPOSITORY ISSUES OR PULL REQUESTS INSTEAD!

ahmozkya

Do not use this guide. The dnscrypt protocol and dnscrypt-proxy configuration file have changed a lot since I wrote this gist. Check the following links for help:

• https://dnscrypt.info/faq
• https://github.com/DNSCrypt/dnscrypt-proxy

Install & Configure

1. Install DNSMasq

$ brew install dnsmasq

alexandrevicenzi

using System;
using System.Net.Http;
using System.Net.Http.Formatting;
using System.Threading.Tasks;

namespace MyProject.Extensions
{
    public static class HttpClientEx
    {
        public const string MimeJson = "application/json";

grappler

module.exports = function(grunt) {

	require('load-grunt-tasks')(grunt);
	
	// Project configuration.
	grunt.initConfig({
		pkg: grunt.file.readJSON('package.json'),

		makepot: {
			target: {

laracasts

The Laracasts PHPStorm theme.

https://www.dropbox.com/s/f4l3qc2falnvq61/laracasts_theme_updated.icls

(Add to ~/Library/Preferences/WebIde80/colors on Mac.)

ctechols

# On slow systems, checking the cached .zcompdump file to see if it must be 
# regenerated adds a noticable delay to zsh startup.  This little hack restricts 
# it to once a day.  It should be pasted into your own completion file.
#
# The globbing is a little complicated here:
# - '#q' is an explicit glob qualifier that makes globbing work within zsh's [[ ]] construct.
# - 'N' makes the glob pattern evaluate to nothing when it doesn't match (rather than throw a globbing error)
# - '.' matches "regular files"
# - 'mh+24' matches files (or directories or whatever) that are older than 24 hours.
autoload -Uz compinit