[Performance Issue] HTTP calls to mailchimp on every page request and config cache flush

[IvanChepurnyi]

The module does HTTP calls on every page when the extension is just installed and not yet all JS URLs are fetched. The code behind a problem is this helper method.

This URL retrieval for JS should have been done via cronjob and storing URL should be done in an own database table. Updating store configuration triggers a complete configuration rebuild that results in a disaster under high load.

Preconditions

1. Clean Magento 2.3.3
2. Recent Mailchimp extension version installed but not configured
3. Blackfire code profiler installed and configured

Steps to reproduce

1. Profile any page with Blackfire
2. Open generated profile and check the call stack of the mentioned method

Expected result

• No HTTP calls
• No updates to core_config_data

Actual results

• HTTP call to Mailchimp API
• Complete wipe-out of configuration cache on the frontend

[gonzaloebiz]

Hi @IvanChepurnyi

thanks for your feedback.
Please take a look at #891 this is already fixed and will be available on next release

Best

[IvanChepurnyi]

The mentioned pull request does not address main issue with configuration cache wipe out on frontend and update of core_config_data table.