Method GetGroupingLevel

catboost/cuda/gpu_data/feature_layout.cpp:60–71

    }

    double TBinarizationInfoProvider::GetGroupingLevel(ui32 featureId) const {
        const ui32 binCount = Manager->GetBinCount(featureId);

        //-x <= 128 does not use atomics and
        // should be groupped by binarization level for best performance
        //+1 bin cause 129 bins, 128 borders
        if (binCount <= 129 || Manager->IsCtr(featureId)) {
            return binCount * 1.0 / 256;
        }

        return 1.0 + binCount * 1.0 / 256;
    }
}