Hello,
Slowness/high CPU usage could be due to (but not limited to):
– A poor or memory-intensive theme. Switch to the WordPress default theme and test loading time and see if you see a difference. If you do, maybe your theme can be re-written to be more efficient.
– Poor or memory-intensive plugins. One by one disable plugins and test loading time and see if you see a difference. If you do, may be that plugin can be re-written to be more efficient.
– your server is slow (e.g., “process hang”, overload, you get a lot of visitors, other problems, etc.); generally, every inexpensive host out there is slow.
– I don’t know if you use Cloudflare or not but if you do I would suggest deactivating it and seeing if it helps. Also sometimes a good purge of the cache on Cloudflare can help.
– Lots of images can cause slowness. Also images loaded without compression.
– Lots of external content (facebook/ gravatar/ google adds, etc.) and redirects in general tends to slow sites down.
Tools for Site analysis:
https://tools.pingdom.com/fpt/
https://developers.google.com/speed/pagespeed/
https://gtmetrix.com/leverage-browser-caching.html
Use plugins to optimize/speed up sites. For example:
Autoptimize
WP Super Cache, etc
Use Jetpack’s Photon option to speed up image delivery.
Also see this tutorial: https://www.wpbeginner.com/beginners-guide/speed-wordpress-save-images-optimized-web/
Optimization
Hope this helps.
Thanks.
