recompose this grid

testing results for: sql
power8
GNU-Fed-p64
sql/test/wlcr28.567 
wlr20 X X0.875 
wlr30 X X1.015 
wlr40 X O0.682 
wlr50 X O0.644 
wlr70 X O4.774 
wlr100 X O5.575 
72353 (linear-hashing)