fluency03

Latency Comparison Numbers
--------------------------
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

fluency03

References from my talk 'Without Resilience, Nothing Else Matters'

• Drift into Failure
• How Complex Systems Fail
• Antifragile: Things That Gain from Disorder
• Leverage Points: Places to Intervene in a System
• Going Solid: A Model of System Dynamics and Consequences for Patient Safety
• Resilience in Complex Adaptive Systems: Operating at the Edge of Failure
• Puppies! Now that I’ve got your attention, Complexity Theory
• [Towards Resilient Architectures: Biology

fluency03

#!/usr/bin/env python

#
# Converts any integer into a base [BASE] number. I have chosen 62
# as it is meant to represent the integers using all the alphanumeric
# characters, [no special characters] = {0..9}, {A..Z}, {a..z}
#
# I plan on using this to shorten the representation of possibly long ids,
# a la url shortenters
#

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/**
 * Class: ListNode
 * Author: Chang LIU
 */

package linkedlist;

import static java.lang.System.out;

public class ListNode<T> {

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/**
 * This is a Scala script: scala-script.scala
 */

println("Hello, World! From a script!")

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/**
 * This is a Scala script: scala-script-arg.scala
 * Say hello to the first argument!
 */

println("Hello, " + args(0) + "!")

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/**
 * This is a Scala script: scala-if.scala
 */

val a = 1
val b = 2

var result1 = ""

if (a == b) {

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/**
 * This is a Scala script: scala-while.scala
 */

var num1: Int = 0

while (num1 < 10) {
  println("num1 = " + num1);
  num1 += 1;
}

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/**
 * This is a Scala script: scala-for.scala
 */

val xs: Array[Int] = Array(1, 2, 3)
val ys: Array[Int] = Array(1, 2, 3, 4, 5)


/** for comprehension: filter/map */
for (x <- xs if x % 2 == 0)

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/**
 * This is a Scala script: scala-loop-func.scala
 */

def printArgs1(args: Array[String]): Unit = {
  var i = 0
  while (i < args.length) {
    println(args(i))
    i += 1
  }