If you want to speed up your website by 40% or even more – use composer command with –optimize parameter. How? Run in the main folder (if you already have composer): composer install -o This operation is safe and there are almost not any drawbacks (more info, check: https://getcomposer.org/doc/articles/autoloader-optimization.md + https://docs.spryker.com/docs/dg/dev/troubleshooting/troubleshooting-performance-issues/not-optimised-composer-on-the-production-environment#solution)
If you downloaded from github releases, then you don’t need to do anything – the option is already enabled.
(Note from posted site: You should not enable any of these optimizations in development as they all will cause various problems when adding/removing classes. The performance gains are not worth the trouble in a development setting.)