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Last updated by Laura 5 months, 2 weeks ago.

Assigned support staff: Laura.

Author Posts
May 28, 2019 at 6:35 pm


We develop a website in WordPress which uses Woocommerce and WPML for translations.
On top of it, we developed a custom product configurator in React which is a separate application, the only common link between the two is that it uses Woocommerce API to fetch product information.
On this custom application, we don't need translations and we're not using WPML API. We noticed the REST Api calls were too slow and so we tried to deactivate the plugins installed on the WP instance and we found that if we deactivate WPML the Woocommerce REST Api calls got significantly faster I've attached screenshots of those calls with and without WPML active.
Also, we're not using WPML to translate the products.

We want to understand why WPML is slowing down the API calls and how can this be fixed.

If needed we can provide access to the project so you can have a look and/or provide any additional information or reports from debugging tools.

May 29, 2019 at 3:25 pm #3916865


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thanks for contacting us.

From your debug information, I see you're using MySQL 5.5.5 (unless you're using Maria DB instead). WPML requires at least version 5.6, so this could be an explanation.

Moreover, the WP Memory Limit needs to be increased. PHP memory limit is fine but WordPress uses 40Mb as default. Minimum requirements for WPML are 128Mb.
Add this near the top of wp-config.php file (after the php opening tag) to increase WP memory:

/** WP Memory Limit */
define( 'WP_MEMORY_LIMIT', '256M' );

The wp-config.php file is located in your WordPress root directory. It's the same file where the database configuration settings are. You will have to access it by FTP or SFTP in order to edit it.
You can check the current WP Memory Limit value from WPML -> Support in the Info section
More info here:

If these suggestions don't help, we'd need credentials and possibly a copy of the site. We suggest Duplicator plugin to do it. I'll enable a private reply.

The topic ‘[Closed] WPML is slowing Woocommerce REST API calls’ is closed to new replies.