3d99bf3 gather changelogs in parallel

Authored and Committed by ignatenkobrain 4 years ago
    gather changelogs in parallel
    
    Before:
    13.88user 4.18system 0:18.09elapsed 99%CPU (0avgtext+0avgdata 16712maxresident)k
    0inputs+0outputs (0major+1357532minor)pagefaults 0swaps
    
    After:
    24.18user 5.63system 0:04.23elapsed 704%CPU (0avgtext+0avgdata 16760maxresident)k
    8inputs+0outputs (0major+1365730minor)pagefaults 0swaps
    
    Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>
    
        
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