4 Commits

Author	SHA1	Message	Date
Rory Mitchell	1fc37e4749	Require leaf statistics when expanding tree (#4015) ... * Cache left and right gradient sums * Require leaf statistics when expanding tree	2019-01-17 21:12:20 -08:00
Rory Mitchell	f75a21af25	Reduce tree expand boilerplate code (#4008)	2018-12-20 15:52:28 +13:00
Rory Mitchell	84c99f86f4	Combine TreeModel and RegTree (#3995)	2018-12-19 12:16:40 +13:00
Jiaming Yuan	19ee0a3579	Refactor fast-hist, add tests for some updaters. (#3836) ... Add unittest for prune. Add unittest for refresh. Refactor fast_hist. * Remove fast_hist_param. * Rename to quantile_hist. Add unittests for QuantileHist. * Refactor QuantileHist into .h and .cc file. * Remove sync.h. * Remove MGPU_mock test. Rename fast hist method to quantile hist.	2018-11-07 21:15:07 +13:00