⚡ Bolt: optimize getTransferableLines same-name station lookup#109
⚡ Bolt: optimize getTransferableLines same-name station lookup#109OsakaLOOP wants to merge 1 commit intobefore-refractorfrom
getTransferableLines same-name station lookup#109Conversation
Co-authored-by: OsakaLOOP <68284076+OsakaLOOP@users.noreply.github.com>
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💡 What: Replaced the O(N*M) linear search over all
railwayDatalines to find implicit physical transfers with an O(1) Map retrieval using the existingbuildStationIndexcache.🎯 Why:
getTransferableLinesis a hot path used extensively by the pathfinding algorithm and the UI to calculate valid station transfers. The nested.find()loops over all railway lines were creating a significant bottleneck.📊 Impact: ~5x performance improvement on local benchmarks (966ms -> 198ms) for large datasets. Reduces CPU load and speeds up UI routing modal interactions.
🔬 Measurement: Verified locally using
benchmark_transferable.ts.PR created automatically by Jules for task 14181257065077815411 started by @OsakaLOOP