Timing hits import using INSERT IGNORE vs. ON DUPLICATE KEY UPDATE

gistfile1.txt

time bundle exec rake import:all:hits

With all hits imported already and no updates to counts to make:
    - master:
        real    0m43.212s
        user    0m8.517s
        sys 0m1.288s
    - hits_import_update_count:
        real    0m47.302s
        user    0m8.029s
        sys 0m1.344s

With all hits for a day given a count of 0 in the database:
    - master:
        real    0m42.705s
        user    0m8.513s
        sys 0m1.416s
    - hits_import_update_count:
        real    0m45.955s
        user    0m8.429s
        sys 0m1.196s

With no hits imported already:
    - master:
        real    1m27.470s
        user    0m8.297s
        sys 0m1.152s
    - hits_import_update_count:
        real    1m29.526s
        user    0m8.789s
        sys 0m1.212s