ben-manes / caffeine / #5470 / 1

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Grow climber sample period at small caches

At small cache sizes the per-sample hit-rate signal is noisy enough
that the climber can converge near the initial window split. For caches
at or below 512 entries, scale the sample period proportionally as the
step size decays so each measurement is taken over more requests when
fine tuning, while remaining reactive at full step.

4007 of 4018 branches covered (99.73%)

8195 of 8197 relevant lines covered (99.98%)

1.0 hits per line