Short introduction to Web Performance by Sergey Chernyshev at August 4th NY Web Performance Meetup. Does not include Andreas Grabner's dynaTrace AJAX Edition slides.

1. August 4
dynaTra c e AJAX E dition
with Andre as Gra bner

2. NY Web Performance
New York, Los Ang eles
San Francisco, Boston
552 memb ers
19th me etup sinc e May 2009

3. Twitter
@NYWebPerf #webperf
@p erfplanet @se g eyche

4. U p coming events
August 24, 2010
Meet for Speed
Fixing your site
Want to host?

5. Want to speak?
Talk to me!

6. Announc ements?
• Hiring we b sp e e d ers?
• H ave a proje ct you're working on?
• Found new tool?
• Me etups / conferenc es?

7. Why p erformanc e?
User exp erienc e
$$$ Money $$$
• Shop zilla + 7-12% conversions!
& -50% op eration costs
• + 15% (+ 60M) downloa ds for Firefox.
(-1se c = > + 2.7% downloa ds)
• Slowness is sticky (G oogle and Microsoft)
SEO: G oogle now uses site's sp e e d in ranking

8. Where to look?
88 re quests, 6.344se c, only 0.968se c on b a ckend - just 15%

9. Where? Front end!
151 re quests, 6.3s, only 0.1s on b a ckend - less then 2%

10. Pa g e Statistics
2003 2009
Siz e: 93.7K 507K
O bje cts: 25.7 64.7
Avera g e We b Pa g e Siz e Q uintuples Sinc e 2003
Andrew King (We bSite O ptimiz ation.com)

11. Avera g e We b Pa g e Siz e Q uintuples Sinc e 2003
Andrew King (We bSite O ptimiz ation.com)

12. Pa g e Statistics
• Loa d Time: +0.533 s
• Time to first byte: + 0.117 s
• Time to start rend er: + 0.179 s
• Pa g e Siz e: +48 KB
• Re quests: + 4
• C onne ctions: + 1 in 1 year
• D NS Lookups: + 1
Are p a g es g etting faster? Patrick Me enan (We bPa g eTest.org)

13. Trends
• Progressive rend ering
• Asynchronous JS loa d and Wid g ets
• T C P/IP and other protocol up gra d es (SPDY)
• Tool stand ardiz ation (e.g. H AR)

14. Tools
• dynaTra c e AJAX E dition • We bPa g eTest.org (A O L Pa g eTest)
• Fire bug (+ N etExport) • HTTP Watch
• YSlow • Fid dler
• Pa g eSp e e d • G oogle Sp e e d Tra c er
• SpriteMe
• ShowSlow
• Browserscop e
• G TMetrix
• C uzillion