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J. Nick Koston
bf917144c4
Saves 4 B per ThrottleAverageFilter instance (28 B → 24 B on 32-bit). have_nan_ is a single boolean that previously cost 4 B due to padding; fold it into the high bit of n_ as a 31-bit + 1-bit bitfield. To guarantee n_ cannot overflow under realistic configurations, cap the YAML time_period at 24 h. At a pessimistic 1 kHz source rate the counter peaks at 86.4M, leaving 25x headroom against 2^31. Anyone needing multi-day rolling averages should be using a different filtering strategy anyway. Breaking change: configurations with throttle_average periods longer than 24 h will now fail validation. No real-world configs are expected to use such values.
