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Images - 7 mistakes (first draft)

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Stoyan Stefanov
Stoyan Stefanov

longer version of the Ajax Experience talk, before we realized 5 minutes are in no way enough to present those slides. The final slides are here: http://www.slideshare.net/stoyan/images-7-mistakes-presentation/

TechnologieArt & Photos
1  sur  20
Image Optimization: 7 mistakes in 5 minutes Stoyan Stefanov [email_address] [email_address]
About the presenter ,[object Object],[object Object],[object Object],[object Object]
Hmm, images? ,[object Object],[object Object],[object Object],[object Object]
What % of page weight is images? ,[object Object],[object Object],[object Object],[object Object],36% Yahoo! JP 10 27% Blogger 9 35% Facebook 8 39% Wikipedia 7 48% MySpace 6 41% MSN 5 64% Live.com 4 62% YouTube 3 75% Google 2 29% Yahoo! 1
GIF vs. PNG8 vs. truecolor PNG ,[object Object],[object Object],[object Object],[object Object]
All we are saying is: “Give PiNG a chance!” ,[object Object],[object Object],[object Object]
Mistake #1: Using GIF when PNG is smaller ,[object Object],[object Object],[object Object],[object Object]
Mistake #2: Not crushing PNGs ,[object Object],[object Object],[object Object],[object Object]
Mistake #3: Not stripping JPEG metadata ,[object Object],[object Object],[object Object],[object Object]
Mistake #4: Using truecolor PNG instead of PNG8 ,[object Object],[object Object],[object Object],[object Object],[object Object]
Mistake #5: Using AlphaImageLoader ,[object Object],[object Object]
Mistake #5: solution ,[object Object],[object Object],[object Object]
Mistake #6: serving dynamically generated images “as is” ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Mistake #7: Not combining images ,[object Object],[object Object],…
Case study: Google charts API 38% saving 12% saving PNG8 (256 colors) Crushed (707 colors) Original (707 colors)
55% saving (1000+ colors are lost but who can tell?) 25% saving PNG8 (256 colors) Crushed (1408 colors) Original (1408 colors)
Demo…
Thank you!
URLs: Exceptional Performance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
URLs: Tools ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Images - 7 mistakes (first draft)

  • 1. Image Optimization: 7 mistakes in 5 minutes Stoyan Stefanov [email_address] [email_address]
  • 2.
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  • 15. Case study: Google charts API 38% saving 12% saving PNG8 (256 colors) Crushed (707 colors) Original (707 colors)
  • 16. 55% saving (1000+ colors are lost but who can tell?) 25% saving PNG8 (256 colors) Crushed (1408 colors) Original (1408 colors)
  • 19.
  • 20.