Website Performance Optimization Andy Killen - WordPress.tv

41 Pages·2012·0.33 MB·English

by  Andy Killen

Website Performance Optimization
Andy Killen
Owner, Phat Reaction
phat-reaction.com
Creator, Share and Follow plugin
share-and-follow.com
CTO, SpeckyBoy Design Magazine
speckyboy.com
[email protected] / [email protected]
http://nl.linkedin.com/ in/andykillen
Don't be shy!
Got a question that relates to the current slide,
don't be shy to ask. Pop up your hand to let me
know.
If you are feeling “hard core” offer your site for
analyses at the end, if we have time
Why Worry About Performance?
Google says
“an extra 500ms in latency costs them 20% of their search traffic”
Amazon states
“for every 100ms of latency, they lose 1% of their sales”
“1 second slower is equal to 1.6billion in lost sales per year”
Forrester reports
“40% of consumers will not wait more than 3-seconds for a page to
load before abandoning a site”
Reddit says
“If we can get 10% more performance, we immediately see 10% more
traffic.”
Shopzilla found
“Better performing website (speed improvements) increased revenue
by 7-12%, increased page views by 25%, and reduced hardware by
50%.“
Why Worry About Performance?
Performance optimized sites
Get more trust
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Cost less in hardware and network
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Get more revenue
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Keep their customers
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Get more page views
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Provide a mission critical environment
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Are more suited to mobile usage
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Get talked about more
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Since August 2011Google take it into account for
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organic rankings
What effects the performance of a
website most (desktop clients)
Network
Server Config
Back end
Front end
0% 10% 20% 30% 40% 50% 60% 70% 80%
When talking about mobile computing, it is more like 90% is front end based
The Front End is where
you should focus most
Before we talk about code and configurations
some wise words
Remember there are many types of
page speed
What a page speed monitoring service thinks
●
What the page speed analysis tool or search
●
engine thinks your page speed is
First load page speed
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Second load page speed
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What the user viewing the site thinks your
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page speed is
THEY ARE DIFFERENT!
Common reasons people give not to
optimize.
The internet is so much faster today!
Depends on where you are in the world
●
– Sub-Saharan Africa anyone?
Depends on your client
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– iPad is slower than a standard laptop
– smartphones tend to be slower still, and often have datarate limitations
Depends on your network connection
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– Wifi is not as fast as wired
– ADSL is not as fast as cable
– Lots of people have mobile phones only
But I have an intranet, we run at 1GB network speeds
Un-optimized code will still take longer to render even with all the speed in the
●
world
Once you get over 4Mbps network speed it is more or less the same speed to
●
load a page.
What things make the biggest
difference to loading times?