Compare the two ends of this window

commit ref when n center lo hi min max
49ca31d3 master 1 month ago 10 1860.0n 1745.0n 1981.0n 1697.0n 2054.0n
b08bf2d6 master 1 month ago 10 984.1n 970.6n 1002.0n 969.2n 1052.0n
68dbc353 master 1 month ago 10 1098.5n 1059.0n 1193.0n 1057.0n 1202.0n
504d01cf master 1 month ago 10 1069.0n 1049.0n 1095.0n 1047.0n 1098.0n
70490f67 1 month ago 10 1244.0n 1189.0n 1418.0n 1139.0n 1451.0n

Values in sec/op.