start of work to add prefetching machinery (+1 squashed commit)
Squashed commits:
[2fe0e72] Revert "start of work to add prefetching machinery"

This reverts commit a1a12452a5106a951b1059463890906de6884c2f. (+1 squashed commit)
Squashed commits:
[a1a1245] start of work to add prefetching machinery