Scan memory optimisations
Experimental rolling buffer for SegmentScanner and MergeScanner not transforming the scanViews
RollingBufferView in SegmentScanner for less memory footprint
Testing the behaviour of mem_optimisation by disabling the rolling buffer
Swithing block storage from toInputStream to toView
TreeMap for merge scanner to speed up after mem-optimisations
Benchmark update after mem-optimisations