Deprecating old code and replacing it with new and improved APIs is an established process in software development. In the core of PHP APIs are provided to trigger and to get notified of deprecations. As a PHP application developer you can then hook into all triggered deprecations using a user defined error handler. You can use this API to collect deprecations and fix them.

During Shopware Community Unconference 2022, we heard a lot about an internal performance week at Shopware, where they took tie to optimize different parts of the core of the Shopware platform. These were mostly performance problems that also affect our customers. Naturally, we are super excited about them their release in version 6.4.11. In this blog post we will look at one improvement to category navigation loading.