TYPO3 Core

The case:

Using inject annotations requires the Reflection framework to do expensive runtime analysis of all classes that get loaded (given: only once, if they are Singletons). This extra overhead (I measured it to around 5% in a pretty basic environment with a few extbase plugins) can be very easily avoided by always using injection methods.

I would personally have the core's classes always use injection methods to increase performance of the base system - and warn users in documentation, that inject annotations should be expected to slow down the code by approximately 5% (also affecting cached contexts, especially affecting the backend).

In our quest for better performance we can take this very easy path without any damage.

A revert merge request is coming right up.