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

rkuhn

import akka.actor.ActorDSL._

case object Work
case object StopIt

implicit val system = akka.actor.ActorSystem()

actor(new Act {
  case class ToDo(items: Int, client: ActorRef, v: Double)
  become {

milessabin

package scalaio

import shapeless._, poly._

object list extends (Id ~> List) {
  def apply[T](t : T) = List(t)
}

object headOption extends (List ~> Option) {
  def apply[T](l : List[T]) = l.headOption

jboner

# How Akka maps to EAI Patterns

Might be up for debate or just plain wrong. Just some notes I scribbled down some time ago. 

-----------------------------------------------------------------------------------------------------------------
EAI PATTERN                     AKKA PATTERN                  REFERENCE
-----------------------------------------------------------------------------------------------------------------
Point to Point Channel          Regular Actor Communication   http://www.eaipatterns.com/PointToPointChannel.html
Event-Driven Consumer           Regular Actor Receive         http://www.eaipatterns.com/EventDrivenConsumer.html
Message Selector                Actor with Stash              http://www.eaipatterns.com/MessageSelector.html

Geal

pub enum State {
  A,
  B(u8),
  C(u8),
  D
  Error
}
  
enum Output {
  X(u8),

s0dyy

  ________   ___    _ ______ _____  ____   ____       _____ _   _  _____ _______       _      _      
 |  ____\ \ / / |  | |  ____|  __ \|  _ \ / __ \     |_   _| \ | |/ ____|__   __|/\   | |    | |     
 | |__   \ V /| |__| | |__  | |__) | |_) | |  | |______| | |  \| | (___    | |  /  \  | |    | |     
 |  __|   > < |  __  |  __| |  _  /|  _ <| |  | |______| | | . ` |\___ \   | | / /\ \ | |    | |     
 | |____ / . \| |  | | |____| | \ \| |_) | |__| |     _| |_| |\  |____) |  | |/ ____ \| |____| |____ 
 |______/_/ \_\_|  |_|______|_|  \_\____/ \____/     |_____|_| \_|_____/   |_/_/    \_\______|______|

NVME / ESP / XBOOTLDR / BTRFS ON LUKS / SYSTEMD-BOOT / DRACUT

This guide is based on several documentations