Since installing WPML plugins the site has become extremely slow

This thread is resolved. Here is a description of the problem and solution.

Problem:
The client installed WPML on their website and experienced significant performance issues. The site became slow and unresponsive, and disabling WPML restored normal performance. The issues persisted despite updating plugins and themes, and the WooCommerce Force Default Variant plugin and the theme Savoy were suspected to be contributing to the problem.
Solution:
We recommended the client to update all outdated functionalities and provided a checklist to enhance site performance, available at https://wpml.org/forums/topic/how-can-i-improve-performance-of-a-slow-site/#post-15350474. We escalated the issue to our 2nd tier support for deeper analysis. It was found that the WooCommerce Force Default Variant plugin and the nm_template_loop_attributes function in the Savoy theme were causing the issues. We advised against using the WooCommerce Force Default Variant plugin and recommended upgrading WPML plugins to the latest version for performance improvements.

If this solution does not resolve your issue or seems outdated, please check related known issues at https://wpml.org/known-issues/, verify the version of the permanent fix, and confirm that you have installed the latest versions of themes and plugins. If problems persist, we highly recommend opening a new support ticket at WPML support forum.

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Tagged: Performance

This topic contains 2 replies, has 1 voice.

Last updated by Carlos Rojas 3 months, 3 weeks ago.

Assisted by: Carlos Rojas.

Author	Posts
March 18, 2025 at 11:36 am #16829818
Carlos Rojas WPML Supporter since 03/2017 Languages: English (English ) Spanish (Español ) Timezone: Europe/Madrid (GMT+02:00)	Hi there, Savoy theme is listed as not compatible with WPML, you can double-check it here: hidden link Our compatibility specialists would like to take a deeper look at this problem. I have created a sandbox site with a new WordPress installation. You can access the sandbox site using this link: hidden link Please install the Savoy theme and the WooCommerce Force Default Variant plugin Let me know when it is done.
March 18, 2025 at 12:36 pm #16830119
lonnekev	I've added the theme and plugin. It's strange that the theme is not listed as compatible, on Themerforest where we purchased it it says that it supports WPML: hidden link
March 18, 2025 at 12:54 pm #16830217
Carlos Rojas WPML Supporter since 03/2017 Languages: English (English ) Spanish (Español ) Timezone: Europe/Madrid (GMT+02:00)	Thank you very much. I have updated our 2nd tier specialists. I will keep you updated on the evolution of this ticket. Nota: We don't have control over what themes add in their themeforest account.
March 21, 2025 at 1:18 pm #16844726
Carlos Rojas WPML Supporter since 03/2017 Languages: English (English ) Spanish (Español ) Timezone: Europe/Madrid (GMT+02:00)	Hi there, Our 2nd tier specialists and compatibility specialists ran several tests, and they don't recommend using the WooCommerce Force Default Variant plugin because it is causing performance problems. And also that during our test, the WooCommerce Force Default Variant plugin was causing issues with WooCommerce default import functionalities, so we simply don't recommend using it. Note: The latest version of WPML plugins (v4.7.2) adds improvements for performance issues, so we do recommend upgrading the WPML plugins to the latest version.