⚡ Bolt: Replace multiple LINQ groupings with single loop#313
⚡ Bolt: Replace multiple LINQ groupings with single loop#313google-labs-jules[bot] wants to merge 1 commit into
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…nEngine Replaced LINQ `.Where()`, `.GroupBy()`, and `.ToDictionary()` allocations with manually managed `Dictionary` collections and explicit `foreach` loops in `NetworkSimulationEngine.cs`. This change removes hidden O(N) sequence enumerations and delegate allocations that cause excessive GC pressure on the simulation engine's critical paths.
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💡 What:
Replaced LINQ
.Where(),.GroupBy(), and.ToDictionary()combinations with manually managedDictionarycollections and explicitforeachloops inNetworkSimulationEngine.cs(specifically aroundSummarizeLandedUnitCostsand thenetwork.TrafficTypesinitialization).🎯 Why:
The previous implementation encapsulated multiple allocations per simulation frame. Specifically,
.GroupBy()followed by.ToDictionary()that includes.Sum()inside its value projection creates extensive sequence enumerators, delegate closures, and multiple O(N) traversal passes. These hidden allocations cause considerable garbage collection pressure on the hot path.📊 Measured Improvement:$O(N)$ pass, entirely avoiding enumerator and delegate heap allocations.
By using a manually constructed
Dictionaryand simpleforeachloops, we combine insertion and value aggregation in a single✅ Verification:
Ran full test suite (
dotnet test tests/MedWNetworkSim.Tests/MedWNetworkSim.Tests.csproj), all 131 tests passed. Randotnet formatto adhere to codebase standards.PR created automatically by Jules for task 14344841152015134688 started by @wnj00524