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PR Description
Summary
This PR optimizes the
formatLegendLocation
helper function in formatLegendLocation.ts by improving how county key lookups are performed.Details
Previously, the function recreated an array of county keys and used
.includes()
on every call. This has been replaced with aSet
(countyKeySet
) that is created once at module load, allowing for faster.has()
lookups.The logic and output of
formatLegendLocation
remain the same. Only the internal implementation has changed for efficiency and code clarity.Benefits
Testing Steps
Add/Remove the diff to see the performance improvement on county maps here:
No other files or logic were affected.