mark-sweep-gc.js

/**
 * Mark and Sweep Garbage Collection technique.
 * MIT Style License
 * by Dmitry Soshnikov
 */

// This diff describes the simplest version of mark and sweep
// GC in order to understand the basic idea. In real practice the
// implementation can be much tricker and more optimized.

max-mapper

Note: this rough draft has turned into https://github.com/maxogden/art-of-node#art-of-node

go to https://github.com/maxogden/art-of-node#art-of-node to view the newer versions of this document

Introduction to Node.js

Table of contents

• Understanding node
• Core modules

ZJONSSON

d3.legend

d3.legend is a quick hack to add a legend to a d3 chart. Simply add a g and .call(d3.legend). Any elements that have a title set in the "data-legend" attribute will be included when d3.legend is called. Each title will appear only once (even when multiple items define the same data-legend) as the process uses a set based on a existing names, not an array of all items.

Color

By default the color in the legend will try to match the fill attribute or the stroke attribute of the relevant items. Color can be explicitly defined by attribute "data-legend-color"

Order

The order of items in the legend will be sorted using the top of the bounding box for each included item. The order can be explicitly defined by attribute "data-legend-pos"

dfm

Copyright (c) 2012–2013 Daniel Foreman-Mackey

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

rwaldron

function log( change ) {
  // Note that |change.object| is actually a reference to the
  // target object.

  if ( change.type === "read" ) {
    console.log( "What was accessed? ", change.name );
    console.log( "What value was given? ", change.oldValue );
  }
  else {

3rd-Eden

'use strict';

/**
 * Require the RED module.
 */
var RED = require('RED');

/**
 * Create a new RED server.
 */

cowboy

/*
 * Abstraction.js
 *
 * Copyright (c) 2012 "Cowboy" Ben Alman
 * Licensed under the MIT license.
 * http://benalman.com/about/license/
 */

var Abstraction = (function($) {
  var _ = $.prototype;

brendangregg

Here's some more perf analysis: what was the limiter for node.js in the original fs.readFile benchmark,
causing large performance difference?

Examining thread microstates using prstat (SmartOS):

# prstat -mLcp 92432 1
Please wait...
[...]
   PID USERNAME USR SYS TRP TFL DFL LCK SLP LAT VCX ICX SCL SIG PROCESS/LWPID 
 92432 root      90  10 0.0 0.0 0.0 0.0 0.0 0.0   7   9 42K   0 node/1

courtneycouch

ar http = require('http');
var fs = require('fs');
var util = require('util');

var fileCache;
var sendFile = function(conn, file) {
       conn.writeHead(200, {"Content-Type": "text/html", "Content-Length": file.length});
       conn.write(file);
       conn.end();
}

jclulow

So, to get something like /etc/rc.local you can use the custom SMF import facility. (See the source for more information about how this actually works.)

/opt is mounted out of zones/opt by default. You can create a directory /opt/custom/smf and populate it with SMF manifests. Any manifests you put in there will be imported by SmartOS when it boots. Below is an example SMF manifest that simply starts /opt/custom/bin/postboot, a self-explanatory shell script that you can use like /etc/rc.local.

Note that it would likely be better to customise and respin your own images, as putting a bunch of platform state in the zones pool undoes some of the benefits of the ramdisk platform architecture that SmartOS has.