Inline Refactor with Context

Refactor this function to improve readability and performance:

File: {{file_path}}
Function: {{function_name}}

Requirements:
- Break it into smaller functions if it exceeds 25 lines
- Extract magic numbers into named constants
- Replace nested if/else chains with early returns or a strategy pattern
- Preserve the exact same inputs and outputs (don't change the public API)
- Match the naming conventions used in the rest of {{file_path}}

Performance improvements:
- Replace any .find() inside a loop with a Map/Set lookup
- Memoize expensive computations if called multiple times with same args
- Remove unnecessary object spreads or array copies

After refactoring, show a before/after comparison of the most significant change and explain the performance improvement.