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

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test_c_api.cc

Optimize cpu sketch allreduce for sparse data. (#6009)

2020-08-19 10:03:45 +08:00