justahuman1 opened a new pull request, #17660:
URL: https://github.com/apache/pinot/pull/17660
Updated the splitPart function to use direct string traversal instead of
allocating a full String[] array, significantly reducing memory pressure in
high-throughput query scenarios.
Performance improvements:
- Space complexity: O(n) → O(1)
- Time complexity: O(n) for both implementations
Added JMH benchmarks to demonstrate improvements and regressions. The
primary regression is in the backward index case with a large index value. This
is the uncommon case and maybe worth the tradeoff since the memory allocation
in the common case is now significantly reduced.
Addresses #17362
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