// multi-utility computation suite · offline · instant · precise
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│ [c] calcalyst_ │
│ computation suite │
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dev.lru-cache-hit-rate Calculator
Calculates LRU cache hit rate from cache size and working set distribution using the frequency-recency access model. LRU hit rate plateaus when cache size reaches the hot working set — doubling cache size beyond this point provides diminishing returns.
Inputs
Cache Size Items
Reference formula or conversion factor shown for context.
Total Unique Items
Reference formula or conversion factor shown for context.
Zipf Exponent
Reference formula or conversion factor shown for context.
Requests
Reference formula or conversion factor shown for context.
Results
estimated hit rate
The value at the specified point or condition.
cache size
CAC (customer acquisition cost) -- total sales and marketing spend divided by new customers acquired. Healthy LTV:CAC ratio is 3:1 or higher.
total unique items
The combined total across all inputs and components.
cache coverage ratio
The fraction of the total that is protected, tested, or accounted for. Higher coverage reduces risk of gaps.
Zipf exponent
Sample size or count used in the calculation.
cache misses per 100k requests
CAC (customer acquisition cost) -- total sales and marketing spend divided by new customers acquired. Healthy LTV:CAC ratio is 3:1 or higher.