O(1)
~15
1000×
5 ms

√T
T1/4
T1/8
AIR 2.1 15 0.08 s
AFR 1.0 20,000 103 s
ADA 17.4 20,000 103 s
BUF 85.9 0 0.01 s
DLD 141.6 0 0.02 s
300k