fikovnik

"**************************************************************************
 * Allowable characters:                                                  *
 *    - a-z                                                               *
 *    - A-Z                                                               *
 *    - 0-9                                                               *
 *    - .+/\*~<>@%|&?                                                     *
 *    - blank, tab, cr, ff, lf                                            *
 *                                                                        *
 * Variables:                                                             *
 *    - variables must be declared before use                             *

fikovnik

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

fikovnik

# Steps to build and install tmux from source.
# Takes < 25 seconds on EC2 env [even on a low-end config instance].

VERSION=2.5
sudo yum -y remove tmux
sudo yum -y install wget tar libevent-devel ncurses-devel
wget https://github.com/tmux/tmux/releases/download/${VERSION}/tmux-${VERSION}.tar.gz
tar xzf tmux-${VERSION}.tar.gz
rm -f tmux-${VERSION}.tar.gz
cd tmux-${VERSION}

fikovnik

import scala.collection.generic.CanBuildFrom
import scala.collection.TraversableLike
import scala.collection.SeqLike
import scala.collection.Seq
import Option.empty

object TraversableExtensions {

  implicit class TraversableWithJoin[A, Repr <: Traversable[A]](val xs: TraversableLike[A, Repr]) extends AnyVal {