[EM] Add tests for irregular data shapes.

dmlc / xgboost

Scalable, Portable and Distributed Gradient Boosting (GBDT, GBRT or GBM) Library, for Python, R, Java, Scala, C++ and more. Runs on single machine, Hadoop, Spark, Dask, Flink and DataFlow

https://xgboost.readthedocs.io/en/stable/

Apache License 2.0

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[EM] Add tests for irregular data shapes. #10980

Closed trivialfis closed 2 weeks ago

trivialfis commented 2 weeks ago

More tests.
Recommend arena in document.

trivialfis commented 2 weeks ago

cc @rongou .