Tim Bowen’s Speeding up WordPress 5/25/10 presentation
Test load times/elements here: Pingdom
Also use YSlow and Google Page Speed to test speed.
PHP Query Elimination:
Use this: <meta charset=”UTF-8″ />
Not this: <meta charset=”<?php bloginfo( ‘charset’ ); ?>” />
Use Google hosted JQuery / Prototype libraries by adding this to functions.php file:
function my_init_method() {
wp_deregister_script( ‘jquery’ );
wp_register_script( ‘jquery’, ‘http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js’);
}
add_action(‘init’, ‘my_init_method’);
Remove actions for WordPress meta, rsd_link and wlmanifest by adding these lines to functions.php:
remove_action(‘wp_head’, ‘wp_generator’);
remove_action(‘wp_head’, ‘rsd_link’);
remove_action(‘wp_head’, ‘wlwmanifest_link’);
Use Google minify for JS and CSS files.
Add Javascript files to bottom of page for faster load speeds.
Define elements in wp-config.php file:
define(‘ENABLE_CACHE’, true );
define(‘WP_ALLOW_REPAIR’, true);
Set the WP URL and Site URL to improve site performance. Make sure these are same as in the General Settings page
define(‘WP_SITEURL’, ‘http://SITENAME.com/cms’);
define(‘WP_HOME’, ‘http://SITENAME.com’);
Set the template directory and stylesheet directory to improve site performance and eliminate server queries
define(‘TEMPLATEPATH’, ‘/home/public_html/cms/wp-content/themes/THEMENAME’);
define(‘STYLESHEETPATH’, ‘/home/public_html/cms/wp-content/themes/THEMENAME’);
Use optimized .htaccess file
Disable hotlinking with this code in .htaccess file:
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www\.)?example\.com/.*$ [NC]
RewriteRule .*\.(gif|jpg|png|ico)$ – [F,L]
</ifModule>
Image hosting off-site with WP-Offload plugin and Steady Offload
Add <?php flush(); ?> after the </head> and before <body> to speed up loading.
Potentially useful plugins:
- DB Cache Reloaded (small speed bump while helping to eliminate queries to server)
- W3 Total Cache (small speed bump, also good for heavy traffic)
- Quick Cache (small speed bump, good for heavy traffic)
- WP Super Cache (didn’t notice speed bump, reviews claim good for heavy traffic)
- PHP Speedy (compresses scripts from plugins, small speed bump)
Demo Night!
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