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Internet Explorer 9 Performance Overview. Jason Weber Performance Lead Internet Explorer Team [email protected] http://www.ietestdrive.com http://blogs.msdn.com/ie. IE9 Platform Objectives. Interoperable HTML5 Interpret the same HTML and CSS markup the same way

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Internet explorer 9 performance overview l.jpg

Internet Explorer 9Performance Overview

  • Jason Weber

  • Performance Lead

  • Internet Explorer Team

  • [email protected]

  • http://www.ietestdrive.com

  • http://blogs.msdn.com/ie


Ie9 platform objectives l.jpg

IE9 Platform Objectives

  • Interoperable HTML5

    • Interpret the same HTML and CSS markup the same way

    • Run the same JavaScript with a consistent programming model

  • GPU-Powered HTML5 Graphics and Media

    • HTML5 demands a high-performance graphics subsystem

    • Display , SVG, Canvas, Images, Text, CSS3

  • Performance, Performance, Performance

    • Networking, JavaScript Execution, Layout Engine, Formatting

Building the next web together!

Platform Previews and Community


Internet explorer 8 l.jpg

Internet Explorer 8


Browser subsystems l.jpg

Browser Subsystems

  • Layout

  • Networking

  • HTML

  • CSS

  • Collections

  • JavaScript

  • Marshalling

  • DOM

  • Formatting

  • Block Building

  • Display


Example site wall street journal l.jpg

Example Site: Wall Street Journal


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Comparing Site Performance

Wall Street Journal

Chicago Tribune

USA Today

New York Times

Washington Post

CNN News

Seattle Times

MSN News

Financial Times

Boston Globe

News Site #1

News Site #2

News Site #3

News Site #4

News Site #5


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Five Popular News Sites

JQuery

YUI

Prototype

MooTools

Scriptaculous

Other (JS Lib)


Ie8 subsystem breakout l.jpg

IE8 Subsystem Breakout


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Average Distribution Across News Sites


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Average Distribution Across AJAX Sites


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Internet Explorer 9


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Internet Explorer 9Networking Improvements


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Networking Performance

HTTP Caching Improvements

  • Improve heuristic expiration

  • Support: crazy-far-futures Expires headers

  • Support: Vary: Accept-Encoding

  • Support Vary: Host

  • Improved scavenger

  • Redirect caching

  • Back/forward optimization

  • Cross-domain HTTPS revalidation mitigation

    Parallel Connection Improvements

  • Increase connections-per-proxy to 12

  • Speculatively pre-open additional connection

  • Improved LCIE connection limiting

    DNS Improvements

  • Pre-fetch based on Link Rel=Prefetch

  • Pre-fetch based on likely matches in ULV flyout

  • Pre-fetch addresses based on previous use

  • Fast-path for IP literals

    General Improvements

  • Shorter User Agent String

  • Gracefully handle codepage restarts

  • Autoproxy in the frame

  • Imgsrc=”” shouldn’t send a request

  • Issue requests on the wire earlier

  • Only download requires files (fonts)


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PLT2: Bytes Downloaded


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Internet Explorer 9New JavaScript Engine & Compiler


Slide16 l.jpg

Interpreters, Compilers, Intermediary Languages, Machine Code, Stack Alignment, JIT, Type System, Registers, Memory Management, Assembly, Bytecode, Tracing, Syntax Trees, Dynamic Languages, Flow Analysis, Static Languages, Regular Expressions, Inlining, oh my…


New javascript interpreter l.jpg

New JavaScript Interpreter

Foreground

Parser

Interpreter

Byte Code

Source Code

AST


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Multi-Core Processing

Multi-Core CPU


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IE8 Processor Distribution

Foreground

Background


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Windows Experience Index Results

Windows Experience Index

Number of CPU Cores for Vista and Win7 Users


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JavaScript Background Compiler

Foreground

Parser

Interpreter

ByteCode

Source Code

AST

Background

Native Code

Background Compiler


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IE9 Background Compilation

Foreground

Background


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WebKitSunSpider Results


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Web Application API Usage


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Internet Explorer 9GPU Powered Graphics


The gamers gpu l.jpg

The Gamers GPU


Everyone has a gpu l.jpg

Everyone Has a GPU


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GPU Processing Performance

Multi-Core CPU

GPU


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Exponential Growth in GPU Power

John D. Owens, David Luebke, Naga Govindaraju, Mark Harris, Jens Krüger, Aaron E. Lefohn, and Tim Purcell. A Survey of General-Purpose Computation on Graphics Hardware. Computer Graphics Forum, 26(1):80–113, March 2007. We acknowledge Computer Graphics Forum, Eurographics (The European Association for Computer Graphics) and Blackwell Publishing.


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Windows Experience Index - GPU

4% 15% 32% 27% 12% 10%

1 2 3 4 5 6 7 8

Windows Experience Index

Graphics Scores of Vista and Win7 Users


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My Laptop WEI Score


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GPU Powered Graphics


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GPU Powered Canvas


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GPU Powered SVG


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GPU Powered Video


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GPU Powered Text


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GPU Powered CSS3


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Behind the ScenesCompiled JavaScriptGPU Powered Graphics


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Demo: Flying Images


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Flying Images – One Animation

IE8

IE9


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IE8 Hardware Usage


Ie9 hardware usage l.jpg

IE9 Hardware Usage


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Measuring Performance


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Performance Metrics Today

<html>

<head>

<script type="text/javascript">

var start = (new Date).getTime();

</script>

</head>

<body>

<script type="text/javascript">

varpageLoad = (new Date).getTime() - start;

</script>

</body>

<imgsrc="http://www.site.com/beacon.png" />

</html>


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Performance Metrics Tomorrow

// after page is loaded

varpageLoad = window.timing.timingMeasures.navigation;

// get access to all the timing information:

JSON.Stringify(window.msPerformance);


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Demo: Web Timings


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Try it out and send feedback…


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IE9 is FundamentallyDifferent


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