make speed: baseline with arrays checked for cycles through their cells as they spill

Recalculating 50 FILTER arrays over 8192 rows walks what reads each
array's cells before it spills: about 12% more allocations and 20% more
time on that case; the rest move within noise.

commit

e35a8974c8ba84bb0120ddd3d78cde84720abcaa

parent

a631dfa5203124ce6413a81cbc376a78f79b321a

author

Dami <dami.etoile@gmail.com>

kind

fix risk score 0.9 of 3, Jev's estimate