Compare the two ends of this window

commit ref when n center lo hi min max
3bd158fb master 2 days ago 10 682.0n 667.7n 698.8n 659.1n 703.9n
89fa694c master 1 day ago 10 702.5n 690.4n 713.9n 690.2n 731.2n
b36a9272 master 1 day ago 10 670.3n 660.3n 679.1n 659.7n 705.7n

Values in sec/op.