Optimize Drupal siteperformance

Kornel Lugosi (@Coornail)

Pronovix

October 18, 2011

,,Amazon found that+100ms increase inresponse time equaled -1%sales”

1

1http://htmlcssjavascript.com/web/why-front-end-performance-matters-to-everyone/

,,Google found that +500msresponse time meant a 20%reduction in searches”

2

2http://htmlcssjavascript.com/web/why-front-end-performance-matters-to-everyone/

Performance / Scaling

Performance != Scaling

Performance

Scaling

Measure

Measure

I Apache Benchmark (ab)

I Jmeter

I Firebug

Jmeter

Monitor

Monitor

I Munin

I Cacti

I Nagios

Backend

Know your parts

I Linux

I Apache (/nginx/Lighttpd)

I Mysql (/postgreSQL/sqlite)

I PHP

Webserver

I Apache

I Nginx

I lighttpd

I . . .

Nginx vs Apache

Reverse proxy foranonymous users

I Varnish

I Nginx

Varnish

Hardware

RAM.

PHP

Opcode caches:

I APC

I XCache

I Zend Optimizer

Opcode caches

Front-end

HTTP requests

I JavaScript aggregation

I CSS aggregation

I mod expires

Parralelize downloads

Use content delivery network:

I Parralel module

I CDN module

I SimpleCDN module

Compress

mod deflate

mod deflate

Utilize cache

mod expires

Keep it minimal

I Reduce DOM elements

I Reduce DNS lookups

Images

I Letting them 404 is veryexpensive in Drupal 6!

I optipng

I jpegtrans

Drupal-related

Anonymous vs Logged in

Database engines

Pressflow

I Drupal fork

I Optimized for performance

I Only supports mysql

I Supports reverse proxies(!)

I Database replication

Pressflow

Pressflow and Varnish atCEU

Drupal 6 vs Drupal 7

Performance relatedmodules

I memcached

I cache router

I boost