Compare the two ends of this window

commit ref when n center lo hi min max
49ca31d3 master 1 month ago 10 27.82µ 26.73µ 29.46µ 26.49µ 32.17µ
b08bf2d6 master 1 month ago 10 23.24µ 23.20µ 23.57µ 23.16µ 24.29µ
68dbc353 master 1 month ago 10 23.44µ 23.33µ 23.95µ 23.22µ 25.20µ
504d01cf master 1 month ago 10 23.08µ 22.93µ 23.39µ 22.84µ 23.41µ
70490f67 1 month ago 10 23.70µ 23.29µ 24.50µ 23.20µ 26.43µ

Values in sec/op.