Jolly-Pirate Jolly-Pirate

CPU

L1 cache reference 0.5 ns
Branch mispredict 5 ns (on a bad CPU architecture you're pretty much screwed)
L2 cache reference 7 ns
Mutex lock/unlock 25 ns
Main memory reference 100 ns
Compress 1K bytes with Zippy 3,000 ns
Send 2K bytes over 1 Gbps network 20,000 ns
Read 1 MB sequentially from memory 250,000 ns

Linux simple performance tweaks

Change the I/O Scheduler

Open $ vim /etc/default/grub then add elevator=noop next to GRUB_CMDLINE_LINUX_DEFAULT. Run $ update-grub and $ cat /sys/block/sda/queue/scheduler to be sure that noop is being used:

$ vim /etc/default/grub
$ update-grub
$ cat /sys/block/sda/queue/scheduler

[noop] deadline cfq

	<?php
	file_put_contents( 'progress.txt', '' );

	$targetFile = fopen( 'testfile.iso', 'w' );

	$ch = curl_init( 'http://ftp.free.org/mirrors/releases.ubuntu-fr.org/11.04/ubuntu-11.04-desktop-i386-fr.iso' );
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt( $ch, CURLOPT_NOPROGRESS, false );
	curl_setopt( $ch, CURLOPT_PROGRESSFUNCTION, 'progressCallback' );
	curl_setopt( $ch, CURLOPT_FILE, $targetFile );

	@echo off

	setlocal EnableDelayedExpansion

	set char=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
	set count=0
	set salt=0

	echo The maximum RC4 key length is 128 bits.
	echo Default KEY length is 16 characters.

	#!/bin/bash

	# No username or passwords in this script, you should use mysql_config_editor
	# to store it securely. The login-path in this script is set to "local-backup" so when you create
	# your .mylogin.cnf with the mysql-config-editor make sure it is set the same
	# See http://dev.mysql.com/doc/refman/5.6/en/mysql-config-editor.html
	# An example to create your config for a mysql user "backup":
	# shell> sudo mysql_config_editor set --login-path=local-backup --host=localhost --user=backup --password
	# The backup user in the mysql server needs these privileges: SELECT, RELOAD, SHOW DATABASES, REPLICATION CLIENT

	$("#search-txt").autocomplete({

	source: function (req, responseFn) {
	$.ajax({
	url: "/search.json",
	dataType: "json",
	success: function(data) {

	var re = $.ui.autocomplete.escapeRegex(req.term);
	var matcher = new RegExp( "^" + re, "i" );

	<?php

	/**
	* Case-insensitive in_array() wrapper.
	*
	* @param mixed $needle Value to seek.
	* @param array $haystack Array to seek in.
	*
	* @return bool
	*/

	#!/bin/bash

	# install the smartctl package first! (apt-get install smartctl)

	if sudo true
	then
	true
	else
	echo 'Root privileges required'

	#!/usr/bin/env python
	# GPGIt : Automatically GPG-encrypt incoming email
	# Aeris <[email protected]>
	# Licensed under AGPLv3 or later

	import email
	import sys, os
	import re
	from pyme.core import Data, Context
	from email.mime.base import MIMEBase

	function alertTerminal(){
	console.log("\007");
	}