Etat de l'art Server-Side JavaScript - JS Geneve

ETAT DE L’ART:
SERVER-SIDE JAVASCRIPT

2012-01-16

mercredi 18 janvier 2012

PRESENTATION
Alexandre Morgaut
Web Architect / Community Manager
Initiateur de @NantesJS

@amorgaut


HISTOIRE


NAISSANCE
Brendan Eich
• 1995 JavaScript creator
Mocha > LiveScript > JavaScript

• 1996
Microsoft JScript (IE4)
NetScape Enterprise Server 2
aka LiveWire/iPlanet

• 1997
ECMAScript 1
“DHTML”
Windows IIS 3


MATURITÉ
• 1998 - HTML/XML DOM, Sun/Mozilla Rhino
• 1999 - ECMAScript 3, XMLHttpRequest, HTML 4
• 2000 - ActionScript, Helma Hop
• 2001 - JSON, Apple JavaScript OSA
• 2002 - JSLint, Mozilla “Phoenix” > Firefox
• 2003 - JavaScript Adobe Press, JScript .NET
• 2004 - E4X , “Web 2.0”, JSDB
• 2005 - Prototype.js, “Ajax”
• 2006 - Firebug, jQuery, “Comet”, APE, “HTML5”
• 2007 - SitePoint Persevere, Rhino on Rails


SSJS: LE RETOUR
• 2008
Aptana Jaxer
CouchDB
Acid Test 3

• 2009
Narwhal & Jack
ServerJS > CommonJS
Node.js
v8cgi, GPSEE
ECMAScript 5

• 2010
Helma NG > RingoJS
Sun Phobos

• 2011
Wakanda
CoffeeScript
ECMAScript 5.1


+ DE 60 SOLUTIONS EXISTANTES

http://en.wikipedia.org/wiki/Comparison_of_server-side_JavaScript_solutions


ÉCOSYSTÈME


COMMUNAUTÉ

• Nombreux Groupes d’utilisateurs

• Nombreuses Conférences

• Nombreux Blogs et livres

• Large documentation

• Langage aussi utilisé par les
développeurs venant d’autres
technologies


LIBRAIRIES & FRAMEWORKS

• JavaScript est le language le
plus populaire sur GitHub

• Nombreuses librairies

• Nombreux framework

https://github.com/languages/JavaScript
http://javascriptlibraries.com/

ENVIRONNEMENT DE
DEVELOPEMENT
• Visual Studio
• XCode
• Eclipse
• NetBeans

• Wakanda Studio
• Cloud9


DÉBOGUEURS
Client-side
• Firebug *

• Web Inspector *
• Dragonﬂy

Server-Side
• Wakanda Debugger *
• Cloud9 Debugger *
* via standard protocols, some debugger can debug JS code running anywhere (server, desktop, mobile, ...)


AUTRES OUTILS ET
STANDARDS
• JSLint / JSHint / JavaScriptLint
• JSON / JSON-Schema / JSON-RPC
• JSDoc
• HTTP Fox / JSON View
• JSMin / Packer / Closure / YUI Compressor / Dojo Shrinksafe
• YUI Test / QUnit / Jasmine
• NPM


ENGINES


ECMASCRIPT 5 & NEXT

• ES5.1 • ES.Next

• Mode strict • Typed Array

• Object freeze • Modules

• Read only properties • Destructuring

• Getter / setter • String templates


C+
C +
SpiderMonkey webkit JavaScriptCore: JSC
3 JIT Compilers: SquirrelFish Extreme: SFX aka Nitro
TraceMonkey, (JIT Compiler inside)
JägerMonkey,
IonMonkey

Jav C+
a +
Rhino V8
Interpreted or Compiled execution JIT Compiler: CrankShaft

Nashorn? C+
+
Trident: MSHTML
Chakra
-> Classic JScript, Managed JScript, & JScript.NET

C+ C+
+ +
Tamarin Carakan
JIT Compiler: NanoJIT
-> ActionScript / “ECMAScript 4”
Previously: Linear A, Linear B, Futhark


CLIENT-SIDE

SpiderMonkey JavaScriptCore

Rhino V8

Tamarin Trident / Chakra Carakan / Futhark


SERVER-SIDE

SpiderMonkey JavaScriptCore

Rhino V8

Trident / Chakra


JAVASCRIPT EVERYWHERE


BENCHMARKS

and what they worth....


BROWSERS WAR II
(MAY 2009)

http://www.maximumpc.com/article/features/browser_brouhaha_your_maximum_guide_browsers_today_and_tomorrow?page=0,6


PERSEVERE & JAVASCRIPTDB
(APRIL 2009)

http://www.sitepen.com/blog/2009/04/20/javascriptdb-perseveres-new-high-performance-storage-engine/


NODE VS THIN VS NARWHAL
(SEPTEMBER 2009)

300 concurrent clients

completed requests:
thin 36045
node 35668
narwhal 2921

> summary(node300$ttime)
Min. 1st Qu. Median Mean 3rd Qu. Max.
12.0 66.0 112.0 239.4 157.0 12200.0

> summary(thin300$ttime)
71.0 84.0 87.0 208.7 107.0 23950.0

> summary(narwhal300$ttime)
928 2837 2935 2921 3018 8759

http://four.livejournal.com/1019177.html


RINGOJS VS NODEJS
(SEPTEMBER 2010)

http://hns.github.com/2010/09/21/benchmark.html


SPIDERMONKEY

1.5 is ~ Firefox 2.0 (and ES-3)
1.7 is ~ Firefox 3.0
1.8 is ~ Firefox 3.6
1.8.5 + JITs is ~ Firefox 4

http://www.page.ca/~wes/SpiderMonkey/Perf/sunspider_history.png

SUNSPIDER 0.9.1
(AUGUST 2011)

7
8
6
5
4
3
2
1
http://expansive-derivation.ossreleasefeed.com/2011/08/javascript-performance-test-results-with-sunspider/


MAIN CONCEPTS


COMMON JAVASCRIPT
• Working Groups:
- CommonJS
- WHATWG
- W3C
- ECMA TC39

• L’ubiquité au delà d’ECMAScript

• la spéciﬁcation HTML5 se faisait aussi appeler:
“Web Applications 1.0”
http://www.whatwg.org/specs/web-apps/current-work/

• Asynchronous & Synchronous APIs


INTEGRATION-ORIENTED
• Java environment
- using Rhino like with
- Helma, Persevere, Narwhal, RingoJS, Sun Phobos...

• .Net environment
- using JScript.NET like with
- IronJS, Node.NET

• Other environments
- C (GPSEE), PHP (J2PA), Ruby (Johnson), Perl (JE), …

ASYNC. EVENT-BASED
Node.js like

• Browser Event-Loop on the Server

• An Event Loop in one single thread

• Cooperative («one at a time») with async. callbacks

• Node.js (V8), SpiderNode, RhiNodeII, Node.NET


SINGLE & MULTI THREADING
One context per thread

SINGLE MULTI
• Low memory usage • Vertical scalability (multi-core)
• Potentially handle lot of requests • Thread-safety for concurrent access
• Cooperative • Preemptive: Parallel code execution
• Shared context • Allow Synchronous APIs
• Use mostly one core* • Uses easily all available cores

Notes:
- an event loop can generate some other threads which could use other cores
- multi-thread architectures can run event loops in some of their threads

DATABASE-DRIVEN
• Document Store
- CouchDB, MongoDB

• Key/value Store
- Riak

• Object Store
- Wakanda

• Push Store
- APE


APIS - PACKAGES


COMMONJS

• Modules • Packages • Promises

• System • Binary • JSGI

• Unit-Testing • File • Stream

http://wiki.commonjs.org/wiki/CommonJS

NODE
ASYNC APIS

• Buffer • Net • Streams

• Events • OS • Timers

• File • Process • ...

http://nodejs.org/docs/v0.5.5/api/


W3C / HTML5 / ES.NEXT
& OTHER STANDARDS
• Console • Structured clones

• Blob, Blob URL* • Typed Arrays*

• DataView* • Web Sockets

• File / FileSystem • Web Storage, Indexed DB

• Modules* • Web Workers

• Progress Events • XHR 2


PACKAGES & MODULES

• github: CommonJS modules in projects (Persevere, Narwhal, RingoJS, ...)

• NPM: Node Package Manager (thousands packages)

• CPM: CommonJS Package Manager (new)

• PINF: Universal module loader


CREDITS

Thanks for their contributions to

Wesley Garland

Ondrej Zara


Full-JS - 5 Trophées
1. Interopérabilité: Interconnexion de systèmes
hétérogènes,interopérabilité entre applications.
Mise en œuvre, utilisation de connecteurs et/ou
de standards ouverts (Open Data, CommonJS,
W3C…).

2. Innovation: toute application présentant une
innovation dans son usage, dans sa mise en
œuvre, par son originalité… Les thèmes de
l’accessibilité et du développement durable sont
les bienvenus.

3. JS Embarqué: Toute application embarquée
hors navigateur et qui soit à usage industriel,
scientiﬁque, médical… (internet des objets,
NFC…).

4. Application Desktop: Applications desktop
end to end JavaScript (Chrome OS, Windows 8
Metro, Mozilla WebRT…)

5. Environnement de développement:
Outils de développement / Traçabilité /
Robustesse / Scalabilité…
full-js.org @fulljs

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