BuiltinValue: insertCoin and unionValue costing #7337
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Extends the cost modeling framework to support lookupCoin, valueContains, valueData, and unValueData builtins. Adds parameter definitions, arity specifications, and integrates with the cost model generation system. Establishes foundation for accurate costing of Value operations in Plutus Core execution.
Creates Values.hs benchmark module with systematic test generation for lookupCoin, valueContains, valueData, and unValueData operations. Includes value generation utilities, individual benchmark functions, and edge case testing with empty values. Enables data collection for accurate cost model parameter fitting.
Implements optimal statistical models for Value operations based on performance characteristics: linear models for lookupCoin and valueContains (size-dependent), constant model for valueData (uniform performance), and linear model for unValueData. Provides accurate cost parameters across all builtin cost model configurations and updates test expectations.
Removes unimplementedCostingFun placeholders for Value builtins and connects them to their respective cost model parameters (paramLookupCoin, paramValueContains, paramValueData, paramUnValueData). Enables accurate execution cost calculation for Value operations in Plutus Core scripts.
Includes extensive benchmark results covering various input sizes and edge cases for lookupCoin, valueContains, valueData, and unValueData. Data validates the chosen statistical models and cost parameters. Provides empirical foundation confirming model accuracy across different operation profiles.
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Add a new Logarithmic newtype wrapper in ExMemoryUsage that transforms size measures logarithmically. This enables linear cost models to effectively capture O(log n) runtime behavior by measuring log(size) instead of size directly. The wrapper computes max(1, floor(log2(size) + 1)) from any wrapped ExMemoryUsage instance, making it composable with existing size measures like ValueOuterOrMaxInner for operations with logarithmic complexity. This infrastructure supports proper costing of Value builtins like lookupCoin which has O(log max(m, k)) complexity.
Refactor the Value benchmarking suite to use Cardano-compliant key sizes (32-byte max) and leverage the new Logarithmic wrapper for accurate modeling of logarithmic operations. Key changes: - Apply Logarithmic wrapper to lookupCoin and valueContains benchmarks for proper O(log n) cost modeling - Consolidate key generators from 4 functions to 2, eliminating duplication - Remove obsolete key size parameters throughout (keys always maxKeyLen) - Extract withSearchKeys pattern to eliminate repetitive code - Simplify test generation by removing arbitrary key size variations - Clean up lookupCoinArgs structure for better readability The refactoring reduces the module from 359 to 298 lines while improving clarity and ensuring all generated Values comply with Cardano's 32-byte key length limit.
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Needs #7344