Performance FTW
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Transcript of Performance FTW
PERFORMANCE FTW
Why your website performance is such a priority
Enrico Foschi – Front End Lead @ SkillPages
skillpages.com/enrico.foschi - @enricofoschi
Performance is priority
Performance has a number of
implications(very important ones)
“Google penalizes slow websites”Random Google guy @ Velocity Conference 2011
“And performance is one of the main criteria on SEO ranking”Random Google guy #2 next to Random Google guy @ Velocity Conference 2011
Slow websitesSUCK!!
Chicks dig fast
websites!(and users too)
FASTER WEBSITEmeans
MORE USERS
I WANT DATA!
(and you’re right)
“75% people do not return to a website that takes more than 4 seconds to load”study from Akamai
1999 2006 20090
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Users tolerance of page load time (in s)study from University of Nebraska
Some interesting facts...
If the website loads in 3 instead of 2 seconds, you risk to lose up to 40% of visitors.Akamai
Some interesting facts...
For every 100ms increase in load time of amazon.com decreased sales by 1%.Kohavi and Longbotham 2007
400ms slower page would see 5-9% more people leave before the page finished loading. Yahoo! Study on Yahoo! homepage
Some interesting facts...
A change from loading a 10-result page in 0.4 seconds to a 30-result page loading in 0.9 seconds decreased traffic and ad revenues by 20%.Linden 2006
Some interesting facts...
20% LESS REVENUE!(damn, this user are really fussy!)
And it’s all about SURVIVAL
So, YES!
Performance
IS priority!
WHAT NOW?
Step #1
MEASURE
Step #2
IMPROVElow hanging fruits first – don’t reinvent the well
Step #3
MONITOR
Creditshttp://www.flickr.com/photos/cincerosonrisa/3588825350/http://www.flickr.com/photos/twinleaves/298592419http://www.flickr.com/photos/vidyo/2414052971http://www.flickr.com/photos/sinkdd/4813452954/http://www.flickr.com/photos/tigerpixel/3185410319/http://www.flickr.com/photos/snackerdesigns/4220559129/http://www.flickr.com/photos/pamelamachado/336874037/http://www.flickr.com/photos/drewleavy/3394892584/
Enrico Foschi – http://skillpages.com/enrico.foschi - @enricofoschi