zhengruifeng created SPARK-32202:
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Summary: tree models auto infer compact integer type
Key: SPARK-32202
URL: https://issues.apache.org/jira/browse/SPARK-32202
Project: Spark
Issue Type: Improvement
Components: ML
Affects Versions: 3.1.0
Reporter: zhengruifeng
a feature from
[LightGBM|https://lightgbm.readthedocs.io/en/latest/Parameters.html#max_bin]:
"LightGBM will auto compress memory according to {{max_bin}}. For example,
LightGBM will use {{uint8_t}} for feature value if {{max_bin=255}}"
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