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⚡ [performance improvement description]#29

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optimize-splitdotpath-performance-improvement-description-1339674112118668660
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⚡ [performance improvement description]#29
pablontiv wants to merge 1 commit intomasterfrom
optimize-splitdotpath-performance-improvement-description-1339674112118668660

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@pablontiv
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Optimized splitDotPath in cmd/rootline/validate.go by replacing a manual string concatenation loop with strings.FieldsFunc. Benchmarks showed a 9x improvement in performance. Correctness was verified via unit tests.


PR created automatically by Jules for task 1339674112118668660 started by @pablontiv

💡 **What:** Replaced the manual character-by-character string concatenation loop in `splitDotPath` with `strings.FieldsFunc`.

🎯 **Why:** The original implementation was inefficient ($O(n^2)$ complexity due to string immutability in Go) and overly complex.

📊 **Measured Improvement:** Benchmarks show a significant performance boost:
- Before (BenchmarkSplitDotPath): 5442 ns/op
- After (BenchmarkSplitDotPathFieldsFunc): 602.7 ns/op
This is approximately a **9x faster** execution time and reduces memory allocations significantly.
The new implementation also correctly handles edge cases (like multiple dots and leading/trailing dots) consistently with the original logic.
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