Presentation on site speed and its importance given to the North Phoenix/Scottsdale - Arizona WordPress Group on Thursday, August 15th, 2013.

1. A Primer on Site Speed
Don’t Make Me Wait!
Joe Fleming
@w33ble
joe@wpcurrent.com

2. Who?
● Web Developer (Node.js, PHP)
● Community Activist
● Owner, Ansible Consulting
● Creator, WPCurrent.com

3. Before we begin...
● OpenHackPHX.com / @openhackphx
○ Code together, on anything, in Phoenix
○ OpenHack #003 - August 29th, Gangplank Chandler
● http://nextplex.com/phoenix-az
○ Calendar of tech-related events
● Phoenix Mobile Festival - August 24th
● Desert Code Camp - November 9th

4. Site Speed

5. Speed Matters
Google
● Page load, 400ms to 900ms (+500ms)
● Decreased traffic and ad revenues by 20%
Amazon
● Artificially increased page loads by 100ms
● Every 100ms caused 1% sales decrease
Source: http://www.svennerberg.com/2008/12/page-load-times-vs-conversion-rates/

6. Glasses Direct
● Conversion rate drops by 6.7% for each additional second
● 47% of consumers expect page load of 2 seconds or less
Speed Matters
Sources: http://blog.tagman.com/2012/03/just-one-second-delay-in-page-load-can-cause-7-loss-in-customer-conversions/
http://blog.kissmetrics.com/wp-content/uploads/2011/04/loading-time-sml.jpg

7. How?

8. ● Faster Servers
○ CPU power
○ I/O latency and speed
● Dedicated Resources
○ VPS
○ Dedicated hardware
● Better Network Connection
Increasing Speed

9. ● Separating Concerns
○ Dedicated hardware
● Faster Software Platforms
○ Faster languages
○ Specialized software
● CDN
● Lazy Loading Content
Increasing Speed

10. ● Making software do less
○ Less plugins
● Caching
Increasing Speed

11. Caching

12. Understanding Caching
User Server
Wordpress
Site
Logic
Read
Database
Generate
HTML
Output

13. Understanding Caching
User Server
Wordpress
Site
Logic
Read
Database
Generate
HTML
Output
Cache?
Save
Cache
Yes
No

14. Options

15. ● Server Caching
○ Varnish
○ APC
● DNS Caching
● Caching Plugins
○ WP Super Cache (Downloads: 4,823,139)
○ W3 Total Cache (Downloads: 2,461,049)
○ Quick Cache (Downloads: 450,960)
Caching Options

16. ● Server Caching
○ Varnish
○ APC
● DNS Caching
● Caching Plugins
○ WP Super Cache (Downloads: 4,823,139)
○ W3 Total Cache (Downloads: 2,461,049)
○ Quick Cache (Downloads: 450,960)
Caching Options

17. Demo Time

18. Questions?
Joe Fleming
@w33ble
joe@wpcurrent.com