[TYPO3-core] RFC #11410: Speed up BEgetRootLine by reusing parts of the rootline from the cache

[Steffen Kamper]

Hi Fabrizio,

have a look at
#11271: Use 2 level cache for BEgetRootLine
where i used a 2-level-cache for the rootline and had awesome 
performance boost with huge site. As i did cache on the complete result, 
we may find a combined solution to get the maximum speed out of it.

vg Steffen