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Deri Jones
Making your website fast - and scalable
Jan 14 2015 #Digibury@Digibury
@SciVisum_Ltd
Tue Feb 3rd
Website Speed
● Black Friday and Xmas peaks
The Need for Speed
● Impatience ● SEO
The Need for Speed
● Impatience ● SEO ● UX is the final USP
YourUX
Your offering
What makes sites slow ?
Network effects ●ADSL 3G 4G
Latency
Latency targets● Backbone best:
● Local: − ADSL 25 mS − Mobile 250 mS
Network effects ●Bulky: Images ●Too many objects ●Not using HTTP Keep alive
Firebug / devTools
Browser effects ●Objects block ●Rendering time
3rd party scripts
The offender: ●<script src="http://3rdparty.com/script.js"></script>
Old solution
These days<script async defer src="siteScript.js" onload="myInit()"></script>
These days:
Browser effects ●Objects block ●Rendering time ●3rd party blocking
Ad serving is slowAnd no political motive to be faster Will get slower as big-Data progresses
Responsive webAvoid the Whitehouse.org story...
Can be good: ●Painless install ●Many configuration choices