Hendrik/xgboost
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2 Commits

Author SHA1 Message Date
Jiaming Yuan
048d969be4
Implement GK sketching on GPU. (#5846) 
* Implement GK sketching on GPU.
* Strong tests on quantile building.
* Handle sparse dataset by binary searching the column index.
* Hypothesis test on dask.
 2020-07-07 12:16:21 +08:00
Egor Smirnov
1b97eaf7a7
Optimized ApplySplit, BuildHist and UpdatePredictCache functions on CPU (#5244) 
* Split up sparse and dense build hist kernels.
* Add `PartitionBuilder`.
 2020-02-29 16:11:42 +08:00