Improve indexOf() performance in DefaultFieldSet #4931
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Replaced linear List#indexOf with a precomputed Map-based index lookup This reduces the time complexity from O(n) to O(1), improving performance for field lookups in wide CSV files. This change preserves existing behavior and error messages Resolves: spring-projects#4930 Signed-off-by: Choi Wang Gyu <[email protected]>
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Replaced linear List#indexOf with a precomputed Map-based index lookup This reduces the time complexity from O(n) to O(1), improving performance for field lookups in wide CSV files. This change preserves existing behavior and error messages
Resolves: #4930