[TYPO3-core] Speed improvements in ClassLoader

[Thomas Maroschik]

Hi Alex,

Christian and I figured out that our both ideas regarding the speed 
improvement failed because typehints and instanceof don't trigger the 
class loader. This means that the class alias has to be established 
directly after loading the class file.

I tried also the approach with the alias map fully in a file based cache 
backend with symlinks. There is close to no benefit in this method as 
you're trading loading an array into memory once against many small file 
operations. While this may pay off when loading less class classes it 
will have a negative impact when loading many.

Greetz,

Tom