Strictly monotonic global access counter#597
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…k timestamp (Environment.TickCount64) because its ~15 ms resolution lets many touches collapse onto the same value during burst access, making LRU eviction order ambiguous. A sequence counter gives every Touch a unique, ever-increasing value, so recency is totally ordered.
Hirogen
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Strictly monotonic global access counter. Used instead of a wall-clock timestamp
(Environment.TickCount64) because its ~15 ms resolution lets many touches collapse onto
the same value during burst access, making LRU eviction order ambiguous. A sequence
counter gives every Touch a unique, ever-increasing value, so recency is totally ordered.