// multi-utility computation suite · offline · instant · precise
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│ [c] calcalyst_ │
│ computation suite │
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// select a module to initialize
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// keyboard shortcuts
/focus search
Escclear search · close calc
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?toggle this panel
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// keyboard_shortcuts
/focus search
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compute when module is open
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dev.sdk-query-index Calculator
Calculates query index efficiency, selectivity, and read amplification factor for indexed vs full-scan execution in a SDK and library engineering context. Index selectivity below 5% (returning >5% of rows) often makes a full table scan faster than an index scan — the query planner should detect this automatically.
Inputs
Rows
Reference formula or conversion factor shown for context.
Select
Reference formula or conversion factor shown for context.
Cost
Reference formula or conversion factor shown for context.
Results
seq scan time
The computed duration or time value.
index scan time
A normalised score comparing the result to a reference baseline.
speedup
Factor by which the improved approach outperforms the baseline. 2x speedup = half the original time.