Performance

Problem:
You are experiencing severe and intermittent backend performance issues on a WordPress + WooCommerce site using WPML. Symptoms include long pending loads with high TTFB when generating HTML pages, and PHP warnings related to gzuncompress() in WPML String Translation.
Solution:
We recommend the following steps to isolate and potentially resolve the issue:
1. Create a full site backup.
2. Update any outdated plugins or themes.
3. Flush any existing cache memory.
4. Deactivate all plugins, including WPML ones.
5. Activate WordPress debug mode. You can find guidance on this at https://developer.wordpress.org/advanced-administration/debug/debug-wordpress/
6. Switch to a default WordPress theme, such as Twenty Twenty.
7. Reactivate the WPML plugins, WooCommerce, and WCML.
8. If the issue resolves, reactivate your theme and other plugins one by one to identify the problematic plugin.
9. Check for error messages in the debug.log file within the wp-content folder.

If these steps do not resolve the issue or if the solution provided here becomes outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the problem persists, please open a new support ticket for further assistance.

Problem:
The client is experiencing a 504 timeout error when updating Formidable Forms on their site. This issue is traced back to the WPML string registration process, specifically the

wpml_register_single_string

function, due to a large number of translation strings (over 90,000) in the WPML database. Each form save processes this entire collection, exceeding the server's PHP execution timeout limits.
Solution:
1. Update the WPML main plugin to version 4.8.5 for performance improvements. Instructions for updating can be found at https://wpml.org/faq/install-wpml/#automated-updates.
2. Increase the PHP memory limit to at least 512M. Add the following code to the "wp-config.php" file:

/** Memory Limit */<br />define('WP_MEMORY_LIMIT', '512M');<br />define('WP_MAX_MEMORY_LIMIT', '512M');

3. Optimize the String Translation table via WPML > Support > Troubleshooting in the WordPress Dashboard.
4. Test the site on a staging version and deactivate all plugins except WPML Multilingual CMS, WPML String Translation, Formidable Forms, and Formidable Forms Multilingual to check if the issue persists.
5. If necessary, consider upgrading to a higher tier of hosting resources.

If these steps do not resolve the issue or if the solution seems outdated or irrelevant to your specific case, we recommend opening a new support ticket. We also highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. For further assistance, please visit our support forum at https://wpml.org/forums/forum/english-support/.

Problème :
Le client utilise WPML pour traduire des chaînes de caractères sur son site et a cessé d'utiliser WPML pour WooCommerce en raison de problèmes de performances. Le plugin WPML génère un grand nombre de requêtes dans la base de données, ralentissant le site.
Solution :
Nous avons analysé les captures d'écran fournies par le client et confirmé que, bien que WPML augmente le nombre de requêtes SQL, le temps d'exécution ajouté reste minime. Nous avons observé que l'absence de cache d'objets persistant, comme Redis ou Memcached, peut augmenter la charge sur la base de données. Nous recommandons fortement l'activation d'un cache objet Redis pour améliorer les performances. De plus, nous suggérons de réaliser des tests de performance en utilisant des outils comme GTmetrix (https://gtmetrix.com) ou Page Load Time (https://chromewebstore.google.com/detail/page-load-time/fploionmjgeclbkemipmkogoaohcdbig) pour comparer les temps de chargement avec et sans WPML activé. Ces tests aideront à déterminer si WPML est la source principale des ralentissements.

Si cette solution ne résout pas votre problème ou semble dépassée, nous vous recommandons de vérifier les problèmes connus sur https://wpml.org/known-issues/, de confirmer que vous avez installé les dernières versions des thèmes et plugins, et si nécessaire, d'ouvrir un nouveau ticket de support pour une assistance personnalisée.