WordPress is currently one of the most popular blogging/CMS applications. Here are some ideas for optimizing WordPress and reducing the CPU consumption of this PHP script.

• Make a backup of your account first, and then upgrade to the latest version of WordPress. The latest versions have optimized code that could reduce the CPU consumption of your site.
• For permalink structure, do not start with the category, tag, author, or post name fields. Instead try /%year%/%postname%/ or /%post_id%/%postname%/. Also, don't worry about 301 redirects, as WordPress will automatically handle that after the permalink change.
• Install WP Super Cache or W3 Total Cache, which can be done from your WordPress Dashboard under Plugins. Follow the links below for information on how to set up these plugins.
  • WP Super Cache (recommended)
  • W3 Total Cache
• Many themes are more CPU intensive.
  • Make sure your page loads are generating no errors in your Error Log (in cPanel under Logs)
  • Also, if you're using dynamic image resizing, you may want to disable this if possible.
  • If all else fails, contact the theme provider for assistance or change to a different theme.
• Disable CPU-intensive plugins or plugins that you no longer need.
  • All related post plugins (WordPress Related Posts, YARPP) can cause a significantly high load in most cases.
  • WPRobot3 and other auto-posters can also cause high load issues and be disabled if they are causing issues.
  • StatPress and other WordPress statistics software should also be disabled, as these, too, can consume too much CPU in some cases. Use Google Analytics instead for statistics.
  • Any other plugins that are not vital to your WordPress should be disabled.
• Manage Spambots. Non-human visitors/posters (aside from web spiders) should be blocked. Use a captcha such as SI CAPTCHA to prevent comment spam.
• Lower the rate at web spiders crawl your WordPress blogs if you have many blogs hosted under your account. High crawl rates can drive up the load on the server, as many bots try to index your sites. To learn more, please see this article: Directory Index.
• The ideal way to optimize images for your WordPress site is to do so before uploading them. WordPress image compression plugins are a great, automated solution to optimize images on your website. Some of the best image compression WordPress plugins include:
  • Smush
  • Optimole
  • Imagify
  • ShortPixel Image Optimizer
  • ImageRecycle
  • WP-Optimize

Always ensure the plugin you choose is updated to work with the latest version of WordPress.