# Package org.apache.sysds.runtime.controlprogram.parfor.opt

Class Summary
CostEstimator: Base class for all potential cost estimators TODO account for shared read-only matrices when computing aggregated stats
CostEstimatorHops
CostEstimatorRuntime: Cost estimator for runtime programs.
OptimizationWrapper: Wrapper to ParFOR cost estimation and optimizer.
Optimizer: Generic optimizer super class that defines the interface of all implemented optimizers.
OptimizerConstrained: Rule-Based ParFor Optimizer (time: O(n)): Applied rule-based rewrites: - see base class.
OptimizerHeuristic: Heuristic ParFor Optimizer: This optimizer extends the rule-based optimizer by a time-based cost estimate for execution type decisions.
OptimizerRuleBased: Rule-Based ParFor Optimizer (time: O(n)): Applied rule-based rewrites - 1) rewrite set data partitioner (incl.
OptNode: Internal representation of a plan alternative for program blocks and instructions in order to enable efficient and simple recursive enumeration and plan changes.
OptTree: Represents a complete plan of a top-level parfor.
OptTreeConverter: Converter for creating an internal plan representation for a given runtime program and to modify/create the runtime program according to the optimized plan.
OptTreePlanMapping
ProgramRecompiler

Enum Summary
CostEstimator.DataFormat
CostEstimator.ExcludeType
CostEstimator.TestMeasure
Optimizer.CostModelType
OptNode.ExecType
OptNode.NodeType
OptNode.ParamType