Internet Explorer 9: Faster Websites with IE9
description
Transcript of Internet Explorer 9: Faster Websites with IE9
![Page 1: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/1.jpg)
Internet Explorer 9: Faster Websites with IE9Aditee ReleArchitect Evangelist
![Page 2: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/2.jpg)
Agenda
• IE9 – a quick look• Performance
Improvement • Network
optimization• JavaScript engine• Layout &
Rendering
![Page 3: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/3.jpg)
PAGE 3
The capabilities of the web are increasing every day, but the way we experience the web isn’t keeping up.
![Page 4: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/4.jpg)
PAGE 4
![Page 5: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/5.jpg)
Some Markup Has Been Retrieved5
![Page 6: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/6.jpg)
Content Starts To Render6
![Page 7: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/7.jpg)
Some Images Start To Appear7
![Page 8: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/8.jpg)
Mast Head Appears8
![Page 9: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/9.jpg)
Right Column Starts To Render9
![Page 10: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/10.jpg)
Personalized Content Starts To Appear10
![Page 11: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/11.jpg)
Advertisements Load11
![Page 12: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/12.jpg)
Done!12
![Page 13: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/13.jpg)
Browser Subsystems
Collections
JavaScript
Marshalling
HTML
CSS
DOM
Layout
Formatting
Block Building
Rendering
Networking
![Page 14: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/14.jpg)
14
TotalSize
NumberElements CSS Rules Image
FilesScript Files
ScriptLines
ScriptLibs
News Site #1 3280kb 8662 1293 137 21 14,216
News Site #2 961kb 820 2964 44 16 3,812
News Site #3 300kb 1187 1366 26 4 9,481
News Site #4 1462kb 4257 893 76 21 11,988
News Site #5 2981kb 3578 1917 88 19 20,722
Five Popular News Sites
JQuery Prototype MooTools Scriptaculous Other (JS Lib)YUI
![Page 15: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/15.jpg)
PAGE 15
Variation in Total Size
Five Popular News Sites
TotalSize
NumberElements CSS Rules Image
FilesScript Files
ScriptLines
ScriptLibs
News Site #1 3280kb 8662 1293 137 21 14,216
News Site #2 961kb 820 2964 44 16 3,812
News Site #3 300kb 1187 1366 26 4 9,481
News Site #4 1462kb 4257 893 76 21 11,988
News Site #5 2981kb 3578 1917 88 19 20,722
JQuery Prototype MooTools Scriptaculous Other (JS Lib)YUI
![Page 16: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/16.jpg)
PAGE 16
Amount of JavaScript
Five Popular News Sites
TotalSize
NumberElements CSS Rules Image
FilesScript Files
ScriptLines
ScriptLibs
News Site #1 3280kb 8662 1293 137 21 14,216
News Site #2 961kb 820 2964 44 16 3,812
News Site #3 300kb 1187 1366 26 4 9,481
News Site #4 1462kb 4257 893 76 21 11,988
News Site #5 2981kb 3578 1917 88 19 20,722
JQuery Prototype MooTools Scriptaculous Other (JS Lib)YUI
![Page 17: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/17.jpg)
PAGE 17
Amount of JavaScript
Five Popular News Sites
TotalSize
NumberElements CSS Rules Image
FilesScript Files
ScriptLines
ScriptLibs
News Site #1 3280kb 8662 1293 137 21 14,216
News Site #2 961kb 820 2964 44 16 3,812
News Site #3 300kb 1187 1366 26 4 9,481
News Site #4 1462kb 4257 893 76 21 11,988
News Site #5 2981kb 3578 1917 88 19 20,722
JQuery Prototype MooTools Scriptaculous Other (JS Lib)YUI
![Page 18: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/18.jpg)
18
Which sites loads the fastest?
TotalSize
NumberElements CSS Rules Image
FilesScript Files
ScriptLines
ScriptLibs
News Site #1 3280kb 8662 1293 137 21 14,216
News Site #2 961kb 820 2964 44 16 3,812
News Site #3 300kb 1187 1366 26 4 9,481
News Site #4 1462kb 4257 893 76 21 11,988
News Site #5 2981kb 3578 1917 88 19 20,722
JQuery Prototype MooTools Scriptaculous Other (JS Lib)YUI
![Page 19: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/19.jpg)
19
Which sites loads the slowest?
TotalSize
NumberElements CSS Rules Image
FilesScript Files
ScriptLines
ScriptLibs
News Site #1 3280kb 8662 1293 137 21 14,216
News Site #2 961kb 820 2964 44 16 3,812
News Site #3 300kb 1187 1366 26 4 9,481
News Site #4 1462kb 4257 893 76 21 11,988
News Site #5 2981kb 3578 1917 88 19 20,722
JQuery Prototype MooTools Scriptaculous Other (JS Lib)YUI
![Page 20: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/20.jpg)
PAGE 20
Multi-System Performance
![Page 21: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/21.jpg)
21
HTML parsingCSS parserCollectionsJavaScriptMarshallingNative OMFormattingBlockBuildLayoutRendering
Average Distribution Across 5 News Sites
![Page 22: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/22.jpg)
22
Average Distribution Across Top AJAX Sites
HTML parsingCSS parserCollectionsJavaScriptMarshallingNative OMFormattingBlockBuildLayoutRendering
![Page 23: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/23.jpg)
Browser Subsystems
Collections
JavaScript
Marshalling
HTML
CSS
DOM
Layout
Formatting
Block Building
Rendering
Networking
![Page 24: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/24.jpg)
Browser Subsystems
Collections
JavaScript
Marshalling
HTML
CSS
DOM
Layout
Formatting
Block Building
Rendering
Networking
![Page 25: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/25.jpg)
Quick Caching Overview
25
First Request
GET /images/banner.jpg HTTP/1.1Host: www.microsoft.com
Second Request
GET /images/banner.jpg HTTP/1.1Host: www.microsoft.com
First Response
HTTP/1.1 200 OKContent-Type: image/jpegExpires: Fri, 30 Sep 2011 00:00:00 GMT
No Response Required
![Page 26: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/26.jpg)
Better performance, with the same markup!Caching Improvements
26
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• Img src=”” shouldn’t send a request• Issue requests on the wire earlier• Only download requires files (fonts)
![Page 27: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/27.jpg)
JavaScript
Best Practices
![Page 28: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/28.jpg)
28
function CreateBoard() { images = []; board.innerHTML = ''; var c = 1; var i = count / 2 - .5; for (var x = -i; x <= i; x++) { for (var z = -i; z <= i; z++) { var img = document.createElement('img'); img.setAttribute("name", "rotatingimage"); img.style.left = '5000px'; img.x3d = x; img.z3d = z; if (useBrowserLogos == true) { switch (c) { case 1: img.src = IEIMAGE; c ++; break; case 2: img.src = LOGO2; c ++; break; case 3: img.src = LOGO1; c ++; break; case 4: img.src = LOGO4; c ++; break; case 5: img.src = LOGO3; c = 1; break; } } else { img.src = IMAGE; } board.appendChild(img); images.push(img); } } countimages.innerHTML = images.length; }
Minify Your JavaScript
e=function(c){return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36))};if(!''.replace(/^/,String)){while(c--){d[e(c)]=k[c]||e(c)}k=[function(e){return d[e]}];e=function(){return'\\w+'};c=1};while(c--){if(k[c]){p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c])}}return p}('y v(){a=[];b.e=\'\';9 c=1;9 i=D/2-.5;d(9 x=-i;x<=i;x++){d(9 z=-i;z<=i;z++){9 0=l.H(\'0\');0.o("n","p");0.q.s=\'r\';0.m=x;0.f=z;g(h==k){j(c){8 1:0.6=t;c++;7;8 2:0.6=F;c++;7;8 3:0.6=G;c++;7;8 4:0.6=J;c++;7;8 5:0.6=w;c=1;7}}C{0.6=I}b.B(0);a.A(0)}}E.e=a.u}')
Minified JavaScript
![Page 29: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/29.jpg)
29
<html><head>
<title>Test</title></head><body>
…<img src="a.gif" /> Item 1<img src="b.gif" /> Item 2<img src=“c.gif" /> Item 3<img src=“d.gif" /> Item 4<img src=“e.gif" /> Item 5<img src=“f.gif" /> Item 6…
</body></html>
Reduce Network Connections
<img src="a.gif" /> Item 1
<img src="b.gif" /> Item 2
<img src=“c.gif" /> Item 3
<img src=“d.gif" /> Item 4
<img src=“e.gif" /> Item 5
<img src=“f.gif" /> Item 6
![Page 30: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/30.jpg)
Reduce Network ConnectionsUse Image Sprites
30
![Page 31: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/31.jpg)
31
<head> <title>Test</title> <style type="text/css"> .a, .b { width: 10; height: 10 } .a, .b { background-image: "abc.gif" } .a { background-position: 0 0 } .b { background-position: 0 -10 } </style></head><body> … <div class="a"></div> Item 1 <div class="b"></div> Item 2 …</body>
Reduce Network Connections
<div class="a"></div><div class="b"></div>
.a, .b { width: 10; height: 10 }
.a, .b { background-image: "abc.gif" }.a { background-position: 0 0 }.b { background-position: 0 -10 }
![Page 32: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/32.jpg)
Browser Subsystems
Collections
JavaScript
Marshalling
HTML
CSS
DOM
Layout
Formatting
Block Building
Rendering
Networking
![Page 33: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/33.jpg)
PAGE 33
The JavaScript Engine
Source Code Parser AST InterpreterByteCod
e
Foreground
![Page 34: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/34.jpg)
PAGE 34
Source Code Parser AST InterpreterByteCode
Foreground
New JavaScript Engine – “Chakra”
BackgroundBackground Compiler
Native Code
Compiled JavaScript In The Background Using Multiple Cores
![Page 35: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/35.jpg)
Chakra – The New JavaScript engine
• JavaScript Background Compilation• Compiles JavaScript source code into native machine code• A new interpreter for executing script on traditional web pages
• Type optimizations• Type Representations• Polymorphic inline caching
• Fast interpreter – • Register based layout,• Efficient opcode
• Library optimizations• Tons of improvements to the JavaScript runtime and libraries
![Page 36: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/36.jpg)
PAGE 36
WebKit SunSpider JavaScript Benchmark Results
![Page 37: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/37.jpg)
JavaScript
Best Practices
![Page 38: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/38.jpg)
Minimize Symbol Resolution
38
var foo obj.foo
Global
Intermediate Scopes
Local
DOM
Prototype Chain
InstanceCost
![Page 39: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/39.jpg)
39
function WorkOnLocalVariable(){
localVariable = 5;return ( localVariable + 1 );
}
Minimize Symbol Resolution
localVariablelocalVariable
![Page 40: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/40.jpg)
40
function WorkOnLocalVariable2(){
var localVariable = 5;return ( localVariable + 1 );
}
Minimize Symbol Resolution
var localVariablelocalVariabl
e
![Page 41: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/41.jpg)
41
function IterateWorkOverCollection2(){
var funcWork = Work;var length = myCollection.length;
for(var i = 0; i < length; i++){
funcWork(myCollection[i]);}
}
Minimize Symbol Resolution
var funcWork = Work;
funcWork
![Page 42: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/42.jpg)
42
<html><head>
<title>Test</title></head><body>
……<script src=“jquery.js” … ></script><script src=“prototype.js” … ></script><script src=“dojo.js” … ></script><script src=“animater.js” … ></script><script src=“extjs.js” … ></script><script src=“yahooui.js” … ></script><script src=“mochikit.js” … ></script><script src=“lightbox.js” … ></script><script src=“jslibs.js” … ></script><script src=“yahooui.js” … ></script>
Reduce and Remove Duplicate Scripts
<script src=“yahooui.js” … ></script>
<script src=“yahooui.js” … ></script>
![Page 43: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/43.jpg)
PAGE 43
Flying Images – One Animation
IE8
IE9
![Page 44: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/44.jpg)
Browser Subsystems
Collections
JavaScript
Marshalling
HTML
CSS
DOM
Layout
Formatting
Block Building
Rendering
Networking
![Page 45: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/45.jpg)
PAGE 45
Using The Full Power of Your PC
![Page 46: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/46.jpg)
Understanding GPU Acceleration
46
Images & video are downloaded, decoded & transferred into intermediate GPU buffers
1
Complex page elements (incl. canvas & SVG) are drawn into intermediate GPU buffers
2
Simple page elements are drawn directly to Web page buffer
3
Intermediate GPU buffers are composited with directly-drawn content to form the visible Web page
4Windows Desktop Windows Manager composes the final screen
5
Content Rendering Page Composition Desktop Composition
![Page 47: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/47.jpg)
Full vs. Partial AccelerationInternet Explorer 9 provides full hardware acceleration
47
![Page 48: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/48.jpg)
Building Better Experiences With The GPU
48
Don’t be afraid of high resolution images
Use the GPU to scale and resize images
Use lots of alpha to create beautiful compositions
![Page 49: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/49.jpg)
Layout & Rendering
Best Practices
![Page 50: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/50.jpg)
Encoding Video
50
Content Type Recommended BitrateSD Content 350 kbps to 2000 kbps
HD Content 350 kbps to 3500 kbps
![Page 51: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/51.jpg)
51
Using Script To Determine If A Video Code Is Supportedtry { var v = document.createElement("video"); if (v && v.canPlayType && v.canPlayType("video/mp4").match(/^(probably|maybe)$/i)) { // Browser can likely play MPEG-4 video } else { // Browser cannot play MPEG-4 video }}catch (e) { // Exception when testing for MPEG-4 Playback}
Providing Multiple Video Sources To Support Multiple Browsers <video id="myVideo"> <source src="video.mp4" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"'> <source src="video.ogv" type='video/ogg; codecs="theora, vorbis"'> <!-- Insert Silverlight or Flash Video Fallback Here --> </video>
Providing Video
![Page 52: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/52.jpg)
52
function BuildUI(){
var elm = document.getElementById('ui');
// Clear existing contentselm.innerHTML = '';
// Generate UIelm.innerHTML += BuildTitle();elm.innerHTML += BuildBody();elm.innerHTML += BuildFooter();
}
Batch Visual Changes
+=+=+=
=
7 innerHTMLReference
s
3 Visual Changes
![Page 53: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/53.jpg)
53
function BuildUI2(){
var elm = document.getElementById('ui');
// Generate UIvar contents = BuildTitle() + BuildBody() + BuildFooter();
// Replace existing contents with UIelm.innerHTML = contents;
}
Batch Visual Changes
=
1 innerHTMLReference
1 VisualUpdate
![Page 54: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/54.jpg)
PAGE 54
window.msPerformance
<script type="text/javascript"> var w = window; var navStart = w.msPerformance.timing.navigationStart + "ms"; var navStartTime = Date(w.msPerformance.timing.navigationStart);</script>
A new set of Performance Metrics integrated at the DOMBrowser interoperable way to measure performance
![Page 55: Internet Explorer 9: Faster Websites with IE9](https://reader031.fdocuments.net/reader031/viewer/2022011717/56816711550346895ddb78b9/html5/thumbnails/55.jpg)
55
Internet Explorer 9
Network and Caching Chakra, the new JavaScript Engine
Hardware Accelerated Graphics
Networking and caching improvements
mean Internet Explorer 9 performs
far fewer HTTP requests when
navigating.
Chakra interprets, compiles, and executes code in
parallel, taking advantage of multi-CPU cores
through Windows and the computer’s hardware.
For Internet Explorer 9, rendering of
graphics, text, and video has been moved
from the CPU to the graphics card.