Rong Ou e4b74c4d22
Gradient based sampling for GPU Hist (#5093)
* Implement gradient based sampling for GPU Hist tree method.
* Add samplers and handle compacted page in GPU Hist.
2020-02-04 10:31:27 +08:00
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2020-01-25 11:26:46 +08:00
2020-01-31 14:52:15 +08:00
2020-01-25 11:26:46 +08:00
2019-12-15 17:31:53 +08:00