CF Performance Tuning

Matt LiottaPresident & CEO

Montara Software, Inc.

Agenda

• Definitions• Silver bullets• What not to do• How to get started• Performance tuning techniques• Q & A

Definitions

• Best practices• Optimization• Scalability• Overhead

Silver Bullets

There are no silver bullets!!!

What Not To Do

• Attempt to write optimized code from the beginning

• Write unreadable i.e. not maintainable code that seems to offer performance advantages

• Use techniques that you don’t understand

How To Get Started

Hopefully with a highly structured application

1. Load test your application2. Find unacceptable bottlenecks3. Use the following techniques

Performance Tuning Techniques

• Caching• Database optimization• UI logic changes• Batch processing• Code optimization• Code rewriting

Caching

Just about any poorly written application can performed adequately with a proper caching strategy

You can cache…• Entire pages• Parts of pages• Backend logic e.g. queries

Caching (cont.)

• See code example

Database Optimization

Almost all poorly performing web applications are a result database interaction

Database interaction can be optimized by…• Changing when and how often you query• Using bind variables• Using stored procedures• Using joins correctly• Using indexes correctly• Not following proper database techniques• Not using a database at all

Database Optimization (cont.)

• See code example

UI Logic Changes

Some performance problems can’t be fixed with code alone because the user interface simply requires to much work to serve a request

A change in UI logic can…• Drastically reduce the amount of

work needed to serve certain requests

• Avoid redundant processing

UI Logic Changes (cont.)

• See code example

Batch Processing

Some web applications do work at request time that could have been done ahead of time

Batch processing can…• Can reduce page execution time by

decoupling some of the work• Allow programmatic control over

when certain work is done by an application

Batch Processing (cont.)

• See code example

Code Optimization

Occasionally, the programming logic is simply inefficient

Code optimization can…• Speed up a request• Reduce request overhead

Code Optimization (cont.)

• See code example

Code Rewriting

Rarely, parts of a web application simply can’t be written well in CFML

Rewriting code in another language can…

• Reduce code complexity• Reduce execution time• Reduce overhead

Code Rewriting (cont.)

• See code example

Q & A

Matt LiottaBlog: http://DevilM.comEmail: mliotta@r337.com