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performance speedup

Conan-Kudo/hawkey,rpm-software-management/hawkey,Conan-Kudo/hawkey,rpm-software-management/hawkey,Conan-Kudo/hawkey,Conan-Kudo/hawkey,mizdebsk/hawkey,mizdebsk/hawkey,rpm-software-management/hawkey,mizdebsk/hawkey,rpm-software-management/hawkey,mizdebsk/hawkey