[Resolved] WooCommerce extremely slow when WPML is enabled (2+ minutes load time)

Hi there,

We had a chat today regarding performance issues on your site.

On chat, we were able to bring the load time down to between 2-4 seconds, but there was still a warning regarding the theme showing up permanently.

I hope the Woodmart Team can patch your site with a workaround until they have fixed the issue on their end.

Drop me a comment once you have heard back from them, and we will take it up from there.

This ticket will remain open for 14 days. I will be awaiting your reply.

Best regards
Andreas

Hello,

Have you also reported this error to Woodmart?

function wp_add_inline_script was called incorrectly. Ne pošiljajte oznak v wp_add_inline_script(). (This message was added in version 4.5.0.)
wp_add_inline_script()
wp-includes/functions.wp-scripts.php:134
woodmart_enqueue_base_scripts()
wp-content/themes/woodmart/inc/enqueue.php:215
do_action('wp_enqueue_scripts')
wp-includes/plugin.php:522
wp_enqueue_scripts()
wp-includes/script-loader.php:2311
do_action('wp_head')
wp-includes/plugin.php:522
wp_head()
wp-includes/general-template.php:3197
load_template('wp-content/themes/woodmart/header.php')
wp-includes/template.php:814
locate_template()
wp-includes/template.php:749
get_header()
wp-includes/general-template.php:48

I'd like to offer to take a closer look at the production site and request temporary access (wp-admin and FTP) to the website to investigate the issue further.

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I may need to install a plugin called "All In One WP Migration" to create a copy of the website on which I can investigate the problem more thoroughly.

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Best regards,
Andreas

Take kindly note that on your production site, WPML is currently not active, and I see a higher load time even in this state:

hidden link
Largest Contentful Paint (LCP)
5.52 s

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Largest Contentful Paint (LCP)
5.50 s

Please let me know how you would like me to proceed. I would need to activate WPML to take further steps. I also might need to enable WP_DEBUG to check for errors and install "Query Monitor" to check for slow queries.

No, I have not yet made any changes to the site, but WPML is currently not active there.

May I activate it?

Without running WPML, I see the following issues:

There are still two errors on the site that are not caused by WPML, but may impact WPML String Translation:

Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the woo-discount-rules domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. (This message was added in version 6.7.0.)
_load_textdomain_just_in_time()
Plugin: woo-discount-rules

Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the woo-discount-rules-pro domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. (This message was added in version 6.7.0.)
_load_textdomain_just_in_time()
Plugin: woo-discount-rules-pro

This should get reported to Flycart.

---

Also, there are two slow queries with a load time impact of about 2.5 seconds, which come from:
Plugin: wc-price-history

This should get reported to WooCommerce.

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I would suggest handling those issues first or testing with WPML, but without the mentioned plugins above.

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Furthermore, there seems to be a duplicate entry on the wp-config.php file which should be handled properly:
Warning Constant WP_CACHE_KEY_SALT already defined
wp-config.php:101

The issue with loading textdomains was reported by us in the following errata about it:
https://wpml.org/errata/php-error-wp-6-7-notice-function-_load_textdomain_just_in_time-was-called/

The author of the plugin should solve this issue. It might not break the site, but it definitely should get solved.

---

The issue with the wp-config.php file is that there are two similar declarations, and only one is accepted:

define( 'WP_CACHE_KEY_SALT', 'clair.si:' );
or
define( 'WP_CACHE_KEY_SALT', '35c40aa166e3a84b0f1590d0f88e3006' );

This line should only exist once in the file. I have commented out the second entry, which solves the current error.

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I would also suggest we wait for now for WooCommerce, as, according to Query Monitor, there are still two queries from WC Price History causing a load time of about 2.5 seconds, but those slow queries seem only to occur on the backend.

There was a WC Price History database update available, which is in progress now.

---

Once I enable WPML, the site becomes slow, and I can see the following error, which can lead to a load time between 20 and 40 seconds:

wpml: cURL error 28: Operation timed out after 45009 milliseconds with 0 bytes received

This error occurs because the site has issues connecting to wpml.org, and usually, such errors are temporary. The cause for this error is currently unclear to me.

I further receive random 502 and 404 errors when navigating the backend.

I then installed the latest beta versions of our plugins, as they come with some bugfixes and performance enhancements. Anhow, the issue persists.

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At this point, I would need to begin disabling plugins to isolate the cause of the issue, which might not be possible as this is a live site.

If there are any installed plugins that are actually not in use, please delete them.

I will try to check the site for errors now and might need to take a local copy of the site for investigating further.

I have tried to create a copy of the website with "All in One WP Migration", but the export fails, which seems to be related to missing permissions.

I am also still experiencing random 502 errors while navigating the backend, even while WPML is disabled.

Furthermore, the issues that I saw today on the live site were not occurring on the staging, which I revised on our chat.

I could offer to try to migrate the site to our test server on Cloudways for testing.

Could you please provide me with more details about the size of your website, including the uploads folder?

Inside FVM those settings, you are removing scripts from Frontend at "Remove JavaScript Scripts":
ams.wpml.org/
hidden link

If I understand the settings of FVM correctly, this will lead to important scripts for WPML not being loaded.

I would suggest removing our URLs from this setting if you plan to use the Advanced Translation Editor.

I will now try again to take a local copy of the site for testing and then get back to you. Take kindly note that due to the size of the site, the migration might take longer than expected.