[common] Optimize getNullCounts() to return int[] instead of Long[]#3054
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wuchong merged 2 commits intoapache:mainfrom Apr 12, 2026
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Since null counts are stored as 4-byte integers in the batch statistics binary format, int[] is sufficient and avoids boxing overhead (8 bytes per Long vs 4 bytes per int). Use -1 as the sentinel for "not available" instead of null. This reduces memory usage for cachedNullCounts and statsNullCounts, especially for wide tables with many fields. Closes apache#3021
wuchong
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LGTM. I pushed a commit to fix the compile problem.
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Thanks, LGTM. |
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Since null counts are stored as 4-byte integers in the batch statistics binary format, int[] is sufficient and avoids boxing overhead (8 bytes per Long vs 4 bytes per int). Use -1 as the sentinel for "not available" instead of null. This reduces memory usage for cachedNullCounts and statsNullCounts, especially for wide tables with many fields.
Closes #3021
Purpose
Linked issue: close #3021
Brief change log
Tests
API and Format
Documentation