Compare the two ends of this window

commit ref when n center lo hi min max
49ca31d3 master 1 month ago 10 4.857n 4.795n 5.165n 4.779n 5.462n
b08bf2d6 master 1 month ago 10 4.507n 4.486n 4.536n 4.485n 4.561n
68dbc353 master 1 month ago 10 4.636n 4.607n 4.762n 4.595n 4.930n
504d01cf master 1 month ago 10 4.613n 4.582n 4.633n 4.538n 4.707n
70490f67 1 month ago 10 4.579n 4.546n 4.590n 4.518n 4.602n

Values in sec/op.