I was reading through the doctrine annotations docs trying to resolve a problem and i came across http://docs.doctrine-project.org/projects/doctrine-common/en/latest/reference/annotations.html#setup-and-configuration which says:

"This creates a simple annotation reader with no caching other than in memory (in php arrays). Since parsing docblocks can be expensive you should cache this process by using a caching reader."

Does turning on injection cacheing negate the performance benefits of annotation cacheing? Or should the injection layer be using a cached annotation reader as well?