Transcript Website performance Why invest in improving page loading speed Bing.com/Live.com Slower site = revenue drop 1 sec = 2.8% 2 sec = 4.3%

Website performance
Why invest in improving page loading
speed
Bing.com/Live.com
Slower site =
revenue drop
1 sec = 2.8%
2 sec = 4.3%
Google
Gets worse
with time
After-effect
Yahoo!
• 0.4 seconds slower =
5-9% drop in full-page traffic
AOL
Slower pages
get less traffic
Shopzilla
Improving
from 6 sec
down to 1.2
seconds
Shopzilla
• Every little bit counts
• Cookie-free components:
+0.5% more revenue
Netflix
• 43% drop in outbound traffic after
enabling compression
Faster site means:
•
•
•
•
•
•
•
More repeat visits
More page views per visit
Better conversions
More revenue
Increased user satisfaction
Hardware and bandwidth savings
More (sponsored) search engine traffic
Where do we focus?
Example: Ashton Kutcher’s Twitter
First view (empty cache)
10%
90%
Repeat visit (full cache)
38%
62%
Where to focus?
• Focus on the front-end
• That’s where the time goes
• Easier to improve
Thank you!
Credits/URLs
• Google, Bing:
http://en.oreilly.com/velocity2009/public/schedule/detail/8523
• Shopzilla: http://en.oreilly.com/velocity2009/public/schedule/detail/7709
• Netflix: http://en.oreilly.com/velocity2008/public/schedule/detail/3632
• AOL: http://en.oreilly.com/velocity2009/public/schedule/detail/7579
• Yahoo!: http://www.slideshare.net/stoyan/yslow-20-presentation
• Bing graphic: http://www.watchingwebsites.com/archives/proof-thatspeeding-up-websites-improves-online-business
• Steve Souders: http://stevesouders.com
• Stoyan Stefanov: http://phpied.com
• Sponsored search and speed:
http://adwords.google.com/support/aw/bin/answer.py?hl=en&answer=87
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