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@jboner
jboner / latency.txt
Last active May 5, 2024 03:12
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
@stonegao
stonegao / AkkaKafkaMailboxTest.scala
Created May 1, 2012 07:24 — forked from mardambey/AkkaKafkaMailboxTest.scala
Akka 2.0 actors with Kafka backed durable mailboxes.
import akka.actor.Actor
import akka.actor.ActorSystem
import akka.agent.Agent
import com.typesafe.config.ConfigFactory
import akka.event.Logging
import akka.actor.Props
import kafka.utils.Utils
import java.nio.ByteBuffer
@viktorklang
viktorklang / swingfutures.scala
Created April 19, 2012 17:58
Akka Futures in the Swing Event Dispatch Thread
// © 2012 Viktor Klang
import akka.dispatch.ExecutionContext
import javax.swing.SwingUtilities
import java.util.concurrent.Executor
//
object SwingExecutionContext {
implicit val swingExecutionContext: ExecutionContext = ExecutionContext.fromExecutor(new Executor {
def execute(command: Runnable): Unit = SwingUtilities invokeLater command
@viktorklang
viktorklang / swingactors.scala
Created April 19, 2012 17:25
Swing Actors using Akka
// ©2012 Viktor Klang
package akka.klang
import akka.dispatch.{ DispatcherPrerequisites, ExecutorServiceFactory, ExecutorServiceConfigurator }
import com.typesafe.config.Config
import java.util.concurrent.{ ExecutorService, AbstractExecutorService, ThreadFactory, TimeUnit }
import java.util.Collections
import javax.swing.SwingUtilities
@retronym
retronym / config.scala
Last active May 9, 2018 05:47
Styles of config propagation: Manual, Implicits, DynamicVariable, Reader
package scalaz.example
object Reader extends App {
/**
* Manual propagation of the environment (in the example, `contextRoot`.)
*/
object Config0 {
def fragment1(contextRoot: String) = <a href={contextRoot + "/foo"}>foo</a>