Performance By DesignA look at Shopzilla's path to high performance

Tim Morrow, Senior Architect

TSSJS 2010

Our Story

Who is Shopzilla?

100M impressions/day

20-29M UV’s per Month

8,000+searches per second

100M+Products

Existing solution

New Solution

Deployment Approach

Shopzilla First Page

Shopzilla Second Page

Shopzilla 50% traffic

Shopzilla 100%

Bizrate Starts

Bizrate 100%

Bizrate 50%

December 2007 March 2008 July 2008 October 2008 November 2008

Performance SLAs

Concurrency in web tier

Parallel Service Invocations

Performance Testing & Monitoring

Grid Caching

Restarts Required

Time Consuming and intricate Automatic read-through

Automatic Expiration

Scalable

US Marketing sessions increased 8%

US Marketing sessions increased 8%

UK Marketing sessions increased 120%

UK Marketing sessions increased 120%

Site Conversion rates increased 7 – 12%

Site Conversion rates increased 7 – 12%

Monetization

Revenue = sessions x conversion % x CPC

Continuous Improvement

Conclusion

• Is performance worth the expense? Yes.

• Simplicity, quality, performance are design decisions

• You get what you measure

• Can’t take your eye off the ball

Thank You!

http://tech.shopzilla.com/

http://timmorrow.org/