Image Optimization Lightning Talk - Ajax Experience
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Image Optimization Lightning Talk - Ajax Experience

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Smushit.com demo and presentation from Ajax Experience.

Smushit.com demo and presentation from Ajax Experience.

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Transcript

  • 1. THE PROBLEM Optimizing images sucks. Stoyan Stefanov Nicole Sullivan http://phpied.com http://stubbornella.org
  • 2. Quantify and improve the performance of all Yahoo! products worldwide
  • 3. HEAVY = SLOW
  • 4. Time to diet From 2003 to 2008: 97K to 312K. 25.7 to 49.9 objects.
  • 5. Images, who cares? Top ten websites 45.6% page weight is images.
  • 6. 7 MISTAKES Image Optimization
  • 7. mistake #1 Using GIF when PNG is smaller 20.42%
  • 8. mistake #2 Not crushing PNG 16.05%
  • 9. mistake #3 Not stripping JPG metadata 11.85%
  • 10. mistake #4 Using truecolor PNG rather than PNG8
  • 11. mistake #5 Using Alpha Image Loader 100ms yahoo search
  • 12. mistake #6 Serving dynamically generated images “as is” 38-55% google charts api
  • 13. mistake #7 Not combining images
  • 14. SOLUTION?
  • 15. JPEG Tran Excellent tools, so many options PngOptimizer OptiPNG
  • 16. Two distinct problems Design Quality versus Optimization Engineering
  • 17. ONE TOOL. MANY ALGORITHMS. Smush it automatically crushes images using the best open source algorithms available.
  • 18. demo: http://smushit.com
  • 19. Let’s keep talking... Stoyan Stefanov Nicole Sullivan http://phpied.com http://stubbornella.org YSlow: Lead Developer nicole@stubbornella.org ssttoo@gmail.com “stubbornella” on the web