Using a Flat Catalog
We would recommend enabling flat catalog for quick reindexing & speedup processing. Magento stores catalog data in multiple tables, based on the EAV (Entity attribute value) model, and due to this product attributes are stored in many tables, SQL queries are sometimes long & complex.
Flat catalog creates a new table, where each row contains all the necessary data about a product or category. A flat catalog indexing can also speed up the processing of catalog. For example, A catalog with as many as 40000 sku’s can be indexed quickly using a flat catalog.
Content Delivery Network
CDN (Content Delivery Network) used to store media files. CDN delivers fast to the users requests as it delivers content from the nearest server of the users.
When a Visitor in a particular location (e.g US) makes the first request for a static content on your website. Then the asset is retrieved from your actual server when it is being delivered, and the assets get cached on the CDN’s US server, the nearest CDN based on visitors location. When next time visitors request the same content on your website, the request goes to the nearest CDN edge server to check if the asset is already in cache. If the request is already cached by the same edge server then the visitor will receive a response from the server. This helps in improving the load time.
Upgrade to latest Magento 2 Version
Magento releases new versions periodically by offering new features, integration, security patches, bug fixes, and more improvements. We would recommend using the latest version of Magento 2. If you’re still using the old version of Magento 2, then upgrade it to the latest version 2.4.2 for better performance
Choose fast Hosting
Hosting is also an important factor for performance optimization. We would recommend choosing a hosting that is fast, reliable, and delivers a smooth experience.
Remove unused modules
Use of many third-party modules means more load of unwanted js files. You can reduce the use of modules if you can. Sometimes there is a possibility many modules are unnecessary. They introduce extra processing with a negative impact on performance and speed. You can uninstall the modules which are not in use. It will help to minimize the load of resources and improve site speed.