Comment by nazri1

I used the default one in CmakeLists.txt (-O3).

I ran the comparison again on another machine that I have and this time their performances are about the same:

c++:

    $ time ./tinykaboom
    ./tinykaboom  46.72s user 0.01s system 364% cpu 12.804 total

go:

    $ time ./tinykaboom     
    ./tinykaboom  42.50s user 0.07s system 350% cpu 12.161 total