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@jboner
jboner / latency.txt
Last active May 3, 2024 15:17
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
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 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@piscisaureus
piscisaureus / pr.md
Created August 13, 2012 16:12
Checkout github pull requests locally

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

@erichurst
erichurst / US Zip Codes from 2013 Government Data
Created December 9, 2013 23:00
All US zip codes with their corresponding latitude and longitude coordinates. Comma delimited for your database goodness. Source: http://www.census.gov/geo/maps-data/data/gazetteer.html
This file has been truncated, but you can view the full file.
ZIP,LAT,LNG
00601,18.180555, -66.749961
00602,18.361945, -67.175597
00603,18.455183, -67.119887
00606,18.158345, -66.932911
00610,18.295366, -67.125135
00612,18.402253, -66.711397
00616,18.420412, -66.671979
00617,18.445147, -66.559696
@abatko
abatko / US Zip Code Geolocations from 2018 Government Data
Last active April 26, 2024 00:48
All US zip codes with their corresponding geolocations (latitude and longitude coordinates). Comma delimited for your database goodness. Source: https://www.census.gov/geographies/reference-files/time-series/geo/gazetteer-files.html > ZIP Code Tabulation Areas > Download the ZIP Code Tabulation Areas Gazetteer File
This file has been truncated, but you can view the full file.
ZIP,LAT,LNG
00601,18.180555, -66.749961
00602,18.361945, -67.175597
00603,18.455183, -67.119887
00606,18.158327, -66.932928
00610,18.295366, -67.125135
00612,18.402253, -66.711397
00616,18.420412, -66.671979
00617,18.447538, -66.557681
00622,17.991245, -67.153993
@malarkey
malarkey / Contract Killer 3.md
Last active April 16, 2024 21:44
The latest version of my ‘killer contract’ for web designers and developers

When times get tough and people get nasty, you’ll need more than a killer smile. You’ll need a killer contract.

Used by 1000s of designers and developers Clarify what’s expected on both sides Helps build great relationships between you and your clients Plain and simple, no legal jargon Customisable to suit your business Used on countless web projects since 2008

…………………………

// ----------------------------------------------------------
// A short snippet for detecting versions of IE in JavaScript
// without resorting to user-agent sniffing
// ----------------------------------------------------------
// If you're not in IE (or IE version is less than 5) then:
// ie === undefined
// If you're in IE (>=5) then you can determine which version:
// ie === 7; // IE7
// Thus, to detect IE:
// if (ie) {}
@glacjay
glacjay / tun-ping-linux.py
Created September 18, 2010 04:49
Reading/writing Linux's TUN/TAP device using Python.
import fcntl
import os
import struct
import subprocess
# Some constants used to ioctl the device file. I got them by a simple C
# program.
TUNSETIFF = 0x400454ca
TUNSETOWNER = TUNSETIFF + 2
@max-mapper
max-mapper / helloworld.js
Created November 27, 2012 06:55
droneduino
var serialport = require('node-serialport')
var sp = new serialport.SerialPort("/dev/ttyO3", {
parser: serialport.parsers.raw,
baud: 9600
})
sp.on('data', function(chunk) {
console.log(chunk.toString('hex'), chunk.toString(), chunk)
})
require 'sinatra'
require 'infusionsoft'
require 'logger'
Infusionsoft.configure do |config|
config.api_url = 'XXXX.infusionsoft.com'
config.api_key = 'XXXXXXXXXXXXXXX'
config.api_logger = Logger.new("./infusionsoft_api.log")
end
@mikeal
mikeal / gist:1840641
Created February 16, 2012 01:33
get a new/clean port with node.js
var portrange = 45032
function getPort (cb) {
var port = portrange
portrange += 1
var server = net.createServer()
server.listen(port, function (err) {
server.once('close', function () {
cb(port)