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