Method Save

catboost/libs/data/target.cpp:978–1026

}

void TProcessedTargetData::Save(IBinSaver* binSaver) const {
    TSerializationTargetDataCache cache;

    /* For serialization we have get serialized target data with ids first before cache is filled
     * For deserialization we get cache filled first and then create target data from it
     *  so we need to change the order of these parts while saving
     */
    TBuffer serializedTargetDataWithIds;

    {
        TBufferOutput out(serializedTargetDataWithIds);
        TYaStreamOutput out2(out);
        IBinSaver targetDataWithIdsBinSaver(out2, false);

        SaveMulti(&targetDataWithIdsBinSaver, TargetsClassCount);
        SaveWithCache(Weights, &targetDataWithIdsBinSaver, &cache.Weights);

        {
            SaveMulti(&targetDataWithIdsBinSaver, SafeIntegerCast<ui32>(Targets.size()));
            for (const auto& [name, dataPart] : Targets) {
                const ui32 dimensionCount = dataPart.size();
                SaveMulti(&targetDataWithIdsBinSaver, name, dimensionCount);
                for (const auto& oneTarget : dataPart) {
                    AddToCacheAndSaveId(oneTarget, &targetDataWithIdsBinSaver, &cache.Targets);
                }
            }
        }

        {
            SaveMulti(&targetDataWithIdsBinSaver, SafeIntegerCast<ui32>(Baselines.size()));
            for (const auto& [name, dataPart] : Baselines) {
                const ui32 dimensionCount = dataPart.size();
                SaveMulti(&targetDataWithIdsBinSaver, name, dimensionCount);
                for (const auto& oneBaseline : dataPart) {
                    AddToCacheAndSaveId(oneBaseline, &targetDataWithIdsBinSaver, &cache.Baselines);
                }
            }
        }

        SaveWithCache(GroupInfos, &targetDataWithIdsBinSaver, &cache.GroupInfos);
    }

    SaveMulti(binSaver, cache);

    SaveArrayData(
        TConstArrayRef<ui8>((ui8*)serializedTargetDataWithIds.Data(), serializedTargetDataWithIds.Size()),
        binSaver
    );
}


TTargetDataProvider::TTargetDataProvider(