hellerbarde

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

domenic

This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
 // the rest of your code goes here.

jgranick

SetOutputFilter DEFLATE

mironov

require "json"
require "csv"

json = File.read("qa.json")
parsed_json = JSON.parse(json)

lists = {}
parsed_json["lists"].each do |list|
  lists[list["id"]] = list["name"]
end

dypsilon

Frontend Development

Attention: the list was moved to

https://github.com/dypsilon/frontend-dev-bookmarks

This page is not maintained anymore, please update your bookmarks.

---

jfarmer

Functional JavaScript by Jesse Farmer is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

Contact Jesse at [email protected] if you have any questions!

emberian

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv) {
    int i = 0;
    char x;
    while (i++ < 10000000) {
        int zipcode, temperature, relhumidity;
        zipcode = random() % 100000;
        temperature = random() % 100000;

vittorioromeo

#ifndef SSVU_FASTFUNC
#define SSVU_FASTFUNC

#include <cstring>
#include <type_traits>
#include <cassert>
#include <cstddef>
#include <memory>
#include <new>
#include <utility>

rtgibbons

var app = require(process.cwd() + '/app');
var winston = require('winston');
var _ = require('lodash');

// Set up logger
var customColors = {
  trace: 'white',
  debug: 'green',
  info: 'green',
  warn: 'yellow',

bgschiller

all: thread_prng adversary Makefile advantages

thread_prng: thread_prng.c
	gcc --std=c99 -o thread_prng -lpthread thread_prng.c

adversary: adversary.c
	gcc --std=c99 -o adversary adversary.c

advantages: adversary thread_prng
	for option in r m; do \