JP LeBreton JPLeBreton

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
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

This project has moved to a GitHub repository.

	#!/usr/bin/env python
	"""
	Check that a particular email address exists.
	Adam Blinkinsop <[email protected]>

	WARNING:
	Checking email addresses in this way is not recommended, and will lead to
	your site being listed in RBLs as a source of abusive traffic. Mail server
	admins do like it when they get connections that don't result in email being
	sent, because spammers often use this technique to verify email addresses.

	import ctypes
	import unittest
	import time
	import os.path
	from sdl2 import *
	from sdl2.sdlmixer import *


	class MixerTests(unittest.TestCase):

	#!/bin/bash
	set -e #quit on error stuff!
	#This script was only testing on linux mint 16, with a large pile of custom tweaking.
	#This file should be used more as a "guide line" than anything else...

	# PLEASE edit certain settings before going around and running this! to make sure of that I
	# have the next line kill the script unless commented out!

	echo "You forgot to set up this file! Edit it with correct paths to use!" && exit 0

	# Copyright (c) 2015 Andrew Durdin
	#
	# Permission is hereby granted, free of charge, to any person obtaining a copy
	# of this software and associated documentation files (the "Software"), to deal
	# in the Software without restriction, including without limitation the rights
	# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	# copies of the Software, and to permit persons to whom the Software is
	# furnished to do so, subject to the following conditions:
	#
	# The above copyright notice and this permission notice shall be included in

	class Table(object):
	def __init__(self):
	self.rows = []

	def add(self, row):
	self.rows.append(row)

	def render(self):
	if not self.rows:
	return

	from string import maketrans, ascii_lowercase as lc, ascii_uppercase as uc
	rots = [maketrans(lc + uc, lc[n:] + lc[:n] + uc[n:] + uc[:n]) for n in range(26)]
	def rot(s, n): return s.translate(rots[n % 26])

	Failed to locate BG usecode file but found FOV.
	// externs
	extern void Func08FF 0x8FF (var var0000);
	extern var Func0829 0x829 (var var0000);

	void Func0096 shape#(0x96) ()
	{
	if (!(event == 0x0001)) goto labelFunc0096_0038;
	if (!UI_get_item_flag(item, 0x000A)) goto labelFunc0096_001C;
	Func08FF("@The sails must be furled before the planks are raised.@");