Rowland Watkins rowlandwatkins

My thoughts on MessagePack

Hi. My name is Sadayuki "Sada" Furuhashi. I am the author of the MessagePack serialization format as well as its implementation in C/C++/Ruby.

Recently, MessagePack made it to the front page of Hacker News with this blog entry by Olaf, the creator of the Facebook game ZeroPilot. In the comment thread, there were several criticisms for the blog post as well as MessagePack itself, and I thought this was a good opportunity for me to address the questions and share my thoughts.

My high-level response to the comments

To the best of my understanding, roughly speaking, the criticisms fell into the following two categories.

How to use a PS3 controller on Mac OS X 10.7 (Lion)

Open Apple menu -> System Preferences -> Bluetooth and disable Bluetooth on Mac as well as any other nearby Macs or devices which will try to pair with and confuse the controller.
Reset PS3 controller by inserting paperclip into pinhole near L2 button.
Connect PS3 controller to Mac with USB cable.
Enable Bluetooth.

Since this is on Hacker News and reddit...

No, I don't distribute my résumé like this. A friend of mine made a joke about me being the kind of person who would do this, so I did (the link on that page was added later). My actual résumé is a good bit crazier.
I apologize for the use of _t in my types. I spend a lot of time at a level where I can do that; "reserved for system libraries? I am the system libraries".
Since people kept complaining, I've fixed the assignments of string literals to non-const char *s.
My use of type * name, however, is entirely intentional.
If you're using an older compiler, you might have trouble with the anonymous unions and the designated initializers - I think gcc 4.4 requires some extra braces to get them working together. Anything reasonably recent should work fine. Clang and gcc (newer than 4.4, at le

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OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

	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

	#!/bin/bash
	#Heith Seewald 2012
	#Feel free to extend/modify to meet your needs.
	#Maya on Ubuntu v.1
	#This is the base installer... I’ll add more features in later versions.
	#if you have any issues, feel free email me at [email protected]

	#### Lets run a few checks to make sure things work as expected.
	#Make sure we’re running with root permissions.
	if [ `whoami` != root ]; then

	object HexBytesUtil {

	def hex2bytes(hex: String): Array[Byte] = {
	hex.replaceAll("[^0-9A-Fa-f]", "").sliding(2, 2).toArray.map(Integer.parseInt(_, 16).toByte)
	}

	def bytes2hex(bytes: Array[Byte], sep: Option[String] = None): String = {
	sep match {
	case None => bytes.map("%02x".format(_)).mkString
	case _ => bytes.map("%02x".format(_)).mkString(sep.get)

	package controllers

	import play.api._
	import libs.ws.WS
	import play.api.mvc._
	import com.micronautics.paypal.{TransactionProcessor, PaypalTransactions}
	import java.net.URLEncoder
	import concurrent.{Await, ExecutionContext}
	import concurrent.duration.Duration
	import java.util.concurrent.TimeUnit

	import org.apache.thrift.protocol.TProtocolFactory
	import com.twitter.finagle.{Service, SimpleFilter}
	import com.twitter.util.{Duration, Time}
	import org.apache.thrift.transport.TMemoryInputTransport
	import com.newrelic.api.agent.{Response, Request, NewRelic, Trace}
	import java.util.Collections

	class NewRelicFinagleFilter(protocolFactory:TProtocolFactory) extends SimpleFilter[Array[Byte], Array[Byte]] {

	def apply(request: Array[Byte], service: Service[Array[Byte], Array[Byte]]) = {