Turning Your Website Performance to 11

Turning your web performance to 11
Newman Scott Hunter
http://driftlogic.net - @nshunter – scott@driftlogic.net

Faster websites make more money.

Source: http://www.slideshare.net/bitcurrent/impact-of-web-latency-on-conversion-rates

Loading Times @ 4 Seconds,
75% of users will not choose to return to the site.
Source: http://www.eugeneloj.com/2006/12/the_user_attent.html

Perception of Performance
User Happyness
Time
@ 100 ms
“Okay, I did something.”
.
.
.
@ 1000 ms
“Okay, I’m waiting for it to load”
@ 10000 ms
“This site is F-ing SLOW.”
Source: http://www.useit.com/papers/responsetime.html

Do I have a problem?

Assessing Performance
Firebug

Assessing Performance
http://webpagetest.org

Site’s Slow
Problem?

Where’s the Problem?
Front End
Images
CSS / Javascript / HTML
Flash / Video / Rich Media
Headers / Cookies
Back End
PHP / Python / Ruby / Java / etc.
Database
Caching
Asset Service

Front End Issues
First Stop: Firebug
Do we need everything on this page?
Video
Flash
Multiple Images
AJAX / Extraneous JS
Kongregate Front Page: 1.2 MB
VS
Kongregate Game Page: 5.3 MB

Front End Issues
http://developer.yahoo.com/yslow/
http://code.google.com/speed/page-speed/

Apache Header Fix

Back End Problems

How do I know if I’m overloaded?

Overloaded Server

Munin Network Monitoring

Monitoring Services
Open Source Free!
http://munin-monitoring.org/
Not Free! But Awesome.
http://cloudkick.com

How do I FIND my problem / bottleneck ?

Application Layer Monitoring

Fixing Problems
Problem
High Load / Multiple Assets / Large Database / etc..
Solution
Pay your way out.
More hardware
Switch from Cloud to Physical
Integrate a CDN
Increase Pipe

Fixing Problems
Problem
Multiple Queries / Large Datasets / Multiple Large Assets
Solution
Add Additional Caching
Application Layer
Presentation Layer
CDN

Fixing Problems
Problem
Slow Search / Large Search Dataset
Solution
Use a Search Appliance

Fixing Problems
Problem
Code Efficiency / Application Size / Language Issues
Solution
Code Refactoring
Change Runtime Environment / Application Server
Rewrite

Chasing the Unicorn

Thank You
Newman Scott Hunter
http://driftlogic.net - @nshunter – scott @driftlogic.net

Turning Your Website Performance to 11

by Newman Hunter on Mar 10, 2011

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