Daniel da Silva ddasilva

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

	from __future__ import with_statement
	from alembic import context
	from sqlalchemy import engine_from_config, pool
	from logging.config import fileConfig

	from models import Base

	config = context.config

	fileConfig(config.config_file_name)

	// requires jquery, buzz.js

	$(document).ready(function() {

	var mySound = new buzz.sound( "/sounds/teen-liver", {
	formats: [ "ogg", "mp3", "acc", "wav" ]
	});

	var mySound2 = new buzz.sound( "/sounds/teen-liver", {
	formats: [ "ogg", "mp3", "acc", "wav" ]