Turning your web performance to 11

Newman Scott Hunterhttp://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 PerformanceUser

HappynessTime

@ 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

Kongregate Game Page: 5.3 MBVS

Front End Issues

http://code.google.com/speed/page-speed/

http://developer.yahoo.com/yslow/

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 ProblemsProblem

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 ProblemsProblem

Multiple Queries / Large Datasets / Multiple Large Assets

Solution

Add Additional Caching

Application Layer Presentation Layer

CDN

Fixing ProblemsProblem

Slow Search / Large Search Dataset

Solution

Use a Search Appliance

Fixing ProblemsProblem

Code Efficiency / Application Size / Language Issues

Solution

Code Refactoring

Change Runtime Environment / Application Server

Rewrite

Chasing the Unicorn

Thank You

Newman Scott Hunterhttp://driftlogic.net - @nshunter – scott @driftlogic.net