3 Commits

Author	SHA1	Message	Date
Jiaming Yuan	77f6cf2d13	Support hessian in host sketch container. (#7081) ... Prepare for migrating approx onto hist's codebase.	2021-07-08 16:33:58 +08:00
Jiaming Yuan	29b7fea572	Optimize cpu sketch allreduce for sparse data. (#6009) ... * Bypass RABIT serialization reducer and use custom allgather based merging.	2020-08-19 10:03:45 +08:00
Jiaming Yuan	ee70a2380b	Unify CPU hist sketching (#5880)	2020-08-12 01:33:06 +08:00