jboner

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

jimbojsb

Step 0:

Get Homebrew installed on your mac if you don't already have it

Step 1:

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)

Step 2:

kost

echo "deb http://emdebian.org/debian/ lenny main" >> /etc/apt/sources.list
apt-get update
apt-get install binutils-arm-linux-gnueabi gcc-4.3-arm-linux-gnueabi libc6-dev-armel-cross

cd /path/to/ruby/1.8.7/sources
autoconf
CFLAGS="--static" LDFLAGS="--static" CC="arm-linux-gnueabi-gcc" ac_cv_func_setpgrp_void=yes ac_cv_func_isinf=no ac_cv_func_isnan=no ac_cv_func_finite=no CROSS_COMPILING=1 ./configure --host="arm-linux-gnueabi" --prefix=/mnt/us/opt
make
make install

necolas

#!/bin/sh

PROG=$0
RSYNC="/usr/bin/rsync"
SRC="/"
DST="/Volumes/Backup/"

# rsync options
# -v increase verbosity
# -a turns on archive mode (recursive copy + retain attributes)

momania

import akka.amqp.AMQP._
import akka.amqp._
import akka.actor._
import java.util.concurrent.{TimeUnit, CountDownLatch}
import util.Random

object LoadBalancingDemo {

  def main(args: Array[String]) {