14. “1 in 4 visitors will abandon a
website if it takes longer than 4
seconds to load.”
Source: http://loadstorm.com/2014/04/infographic-web-performance-impacts-conversion-rates/
15. “1 second delay in page load time
could cost Amazon $1.6 billion in
annual sales”
Source: http://www.fastcompany.com/1825005/how-one-second-could-cost-amazon-16-billion-sales
16. “Obama’s 2011 fundraising campaign raised an
additional $34 million when the Obama for
America website shrunk page load time from
5 seconds to 2 seconds”
Source: http://kylerush.net/blog/meet-the-obama-campaigns-250-million-fundraising-platform/
24. About 75% of mobile users consider
mobile slower than desktop
About 40% of mobile users are unhappy
with their experience
Source: https://content.akamai.com/PG1526-PerformanceMatters.html
25. About 20% of Americans depend on
smartphones almost exclusively for internet
access…
and out of those, 30% frequently reach
their Max Monthly Data Allowance
66. Resize Images
• Do not upload raw images on the web
• Find the max width of the content area and use
that width to resize your images
• Resize them in bulk
79. Recap
• Measure Performance
• Minimize request (less request, concatenate, and use CSS/
svg/icon fonts instead of graphics)
• Optimize request (cache and Gzip)
• Reduce size (minify and resize/optimize images)
• Automate (use tools like Grunt)
80. There are more…
Other techniques that I’m currently looking into:
• Critical CSS
• Improving render times (like animation and fonts)
• Prefetching, Preloading and Prebrowsing
83. Non-Technical Challenges
• Hard to measure (what is considered fast for a project?)
• Having a fast website is a given (never on a RFP or SOW)
• Getting buy-ins from client
• Dealing with “pretty” designs
• “Surprises” during development
84. Recommendations
• Include Performance during discovery
(competitive analysis)
• Performance budget
(want something new? kill something else)
• Styleguide driven development
• Keep talking about it