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When I was writing a blog article today, I realized that my wordpress suddenly became extremely slow. Until yesterday it'd been working totally fine.

To give you some background information, I'll write down what I have searched and tried by myself.

[What I have found out]

  • It is not an Internet connection problem. I could open my Facebook and other websites totally fine. Rather, they were responding pretty fast.
  • I used "PageSpeed Insights" to check if my wordpress was actually slow. On a scale of 0 to 100, the assessment result was 25, which means that my wordpress was actually very slow.

[What I have tried]

  • I deleted the cache. First I tried deleting my browser's cache (Google Chrome). It had no effect, so I also tried deleting my wordpress's cache.

When I deleted my wordpress's cache for the first time it seemed to be working. It began to load pages properly again and I could post and edit my articles. But several minutes later it just got back to the "frozen" state. Now it's extremely slow again.

I googled even more, and one of the pages that I found says that some other things that can make your wordpress slow are

  • Theme of the wordpress
  • Plugin
  • Source code
  • Photos

etc.

I don't think the theme is the cause of this problem, because ever since I set the theme for my wordpress for the first time (November 2017) I've never changed a thing about it.

As for the source code, basically I have done very little. The last time I edited a little bit is when I got authorized for Google Adsense in the middle of January 2019.

I don't think photos are problem either. I have posted 85 articles. Considering there are many bloggers who have already posted over 500 articles with images, I can hardly believe photos that I have uploaded are so much burden on my wordpress.

I haven't installed so many plugins either. There are 9 of them that are currently active.

  • AddQuicktag
  • Akismet Anti-Spam
  • BackWPup
  • Contact Form 7
  • Easy FancyBox
  • Jetpack by WordPress.com
  • Ptengine - Real time web analytics and Heatmap
  • Shortcodes Ultimate
  • TinyMCE Annotate
  • WP Fastest Cache

Any idea what can be causing this problem?

migrated from superuser.com Jun 2 at 15:31

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First (if this is right then the solution was very quick) if the website is slow and then after deleting the 'WP Fastest Cache' cache it was temporarily fast again and then slowed down, it really sounds to me like that plugin is the culprit. Try disabling that plugin first and see if that fixes the problem.

Second (only if #1 fails) we may need to optimize the site, get this plugin

Third if both #1 and #2 fail, go to https://www.webpagetest.org/ to get a more detailed view of what is slowing down your site and share a link to the results.

  • Thank you for your advice. There are 9 plugins that are active at this moment. Which one should I disable? Do you mean that I need to disable all of them at once, or try one by one to see which particular plugin is the culprit? – Shinichi Takagi Jun 2 at 17:39
  • Oh wait, I've just realized that I misunderstood earlier. You meant that "WP Fastest Cache" is the one I should try disabling. – Shinichi Takagi Jun 3 at 17:43
  • Yes, first try disabling that plugin to see if that fixes the issue. If not, try disabling each of the other plugins until you find the one causing the problems. – brothman Jun 4 at 11:15
  • I tried disabling each of the plugins one by one, and the score of the assessment went up to 65 from 25 on this website developers.google.com/speed/pagespeed/insights/… – Shinichi Takagi Jun 9 at 10:39
  • but it doesn't improve the score further. Isn't there anything else to do? – Shinichi Takagi Jun 9 at 10:40

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