Matthew Glinski mglinski

Frontend Development

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Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns                     on recent CPU
L2 cache reference ........................... 7 ns                     14x L1 cache
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns                     20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs 4X memory

	//
	// Regular Expression for URL validation
	//
	// Author: Diego Perini
	// Created: 2010/12/05
	// Updated: 2018/09/12
	// License: MIT
	//
	// Copyright (c) 2010-2018 Diego Perini (http://www.iport.it)
	//

	# agent type detection, based on idea from from http://notnotmobile.appspot.com/
	map $http_user_agent $agent_type_phase1 {
	default 'mobile';
	'' 'unknown';
	~*iphone\|ipod\|blackberry\|palm\|windows\s+ce 'mobile';
	~*windows\|linux\|os\s+[x9]\|solaris\|bsd 'desktop';
	~*spider\|crawl\|slurp\|bot\|feedburner 'bot';
	}
	map $http_x_skyfire_phone $agent_type_phase2 {
	default 'mobile';

	#!/bin/bash
	# virtualenv-auto-activate.sh
	#
	# Installation:
	# Add this line to your .bashrc or .bash-profile:
	#
	# source /path/to/virtualenv-auto-activate.sh
	#
	# Go to your project folder, run "virtualenv .venv", so your project folder
	# has a .venv folder at the top level, next to your version control directory.

	#!/usr/bin/env sh

	##
	# This is script with usefull tips taken from:
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx
	#
	# install it:
	# curl -sL https://raw.github.com/gist/2108403/hack.sh \| sh
	#

	// Usage: $form.find('input[type="checkbox"]').shiftSelectable();
	// replace input[type="checkbox"] with the selector to match your list of checkboxes

	$.fn.shiftSelectable = function() {
	var lastChecked,
	$boxes = this;

	$boxes.click(function(evt) {
	if(!lastChecked) {
	lastChecked = this;

	-server
	-Xms2048m
	-Xmx2048m
	-XX:NewSize=512m
	-XX:MaxNewSize=512m
	-XX:PermSize=512m
	-XX:MaxPermSize=512m
	-XX:+UseParNewGC
	-XX:ParallelGCThreads=4
	-XX:MaxTenuringThreshold=1

	function heidiDecode(hex) {
	var str = '';
	var shift = parseInt(hex.substr(-1));
	hex = hex.substr(0, hex.length - 1);
	for (var i = 0; i < hex.length; i += 2)
	str += String.fromCharCode(parseInt(hex.substr(i, 2), 16) - shift);
	return str;
	}
	document.write(heidiDecode('755A5A585C3D8141786B3C385E3A393'));

	{
	{I have\|I've} been {surfing\|browsing} online more than {three\|3\|2\|4} hours today, yet I never found any interesting article like yours. {It's\|It
	is} pretty worth enough for me. {In my opinion\|Personally\|In my view}, if all {webmasters\|site owners\|website owners\|web owners} and bloggers made good content as
	you did, the {internet\|net\|web} will be {much more\|a lot more}
	useful than ever before.\|
	I {couldn't\|could not} {resist\|refrain from} commenting. {Very well\|Perfectly\|Well\|Exceptionally well} written!\|
	{I will\|I'll} {right away\|immediately} {take hold of\|grab\|clutch\|grasp\|seize\|snatch}
	your {rss\|rss feed} as I {can not\|can't} {in finding\|find\|to find} your {email\|e-mail} subscription {link\|hyperlink} or {newsletter\|e-newsletter} service. Do {you have\|you've} any?
	{Please\|Kindly} {allow\|permit\|let} me {realize\|recognize\|understand\|recognise\|know} {so that\|in order that} I {may just\|may\|could} subscribe.
	Thanks.\|