benchmark2.cpp results
VS 2017 15.9.7 64 bit (cl.exe 19.16, /EHsc /std:c++17)
/Od
Compile time
variant2 (-DONLY_V2): 1403 ms
boost::variant (-DONLY_BV): 2972 ms
std::variant (-DONLY_SV): 1057 ms
Run time
N=100000000:
prefix: 7016 ms; S=416666583333336
variant2: 24723 ms; S=416666583333336
boost::variant: 60438 ms; S=416666583333336
std::variant: 20707 ms; S=416666583333336
/O2 /DNDEBUG
Compile time
variant2 (-DONLY_V2): 1778 ms
boost::variant (-DONLY_BV): 3252 ms
std::variant (-DONLY_SV): 1372 ms
Run time
N=100000000:
prefix: 803 ms; S=416666583333336
variant2: 2124 ms; S=416666583333336
boost::variant: 6191 ms; S=416666583333336
std::variant: 2193 ms; S=416666583333336
g++ 7.4.0 -std=c++17 (Cygwin 64 bit)
-O0
Compile time
variant2 (-DONLY_V2): 1739 ms
boost::variant (-DONLY_BV): 3113 ms
std::variant (-DONLY_SV): 1719 ms
Run time
N=100000000:
prefix: 5163 ms; S=416666583333336
variant2: 20628 ms; S=416666583333336
boost::variant: 43308 ms; S=416666583333336
std::variant: 42375 ms; S=416666583333336
-O1
Compile time
variant2 (-DONLY_V2): 1484 ms
boost::variant (-DONLY_BV): 2947 ms
std::variant (-DONLY_SV): 1448 ms
Run time
N=100000000:
prefix: 781 ms; S=416666583333336
variant2: 1992 ms; S=416666583333336
boost::variant: 2249 ms; S=416666583333336
std::variant: 4843 ms; S=416666583333336
-O2 -DNDEBUG
Compile time
variant2 (-DONLY_V2): 1547 ms
boost::variant (-DONLY_BV): 2999 ms
std::variant (-DONLY_SV): 1528 ms
Run time
N=100000000:
prefix: 793 ms; S=416666583333336
variant2: 1686 ms; S=416666583333336
boost::variant: 1833 ms; S=416666583333336
std::variant: 4340 ms; S=416666583333336
-O3 -DNDEBUG
Compile time
variant2 (-DONLY_V2): 1595 ms
boost::variant (-DONLY_BV): 3084 ms
std::variant (-DONLY_SV): 1620 ms
Run time
N=100000000:
prefix: 853 ms; S=416666583333336
variant2: 1681 ms; S=416666583333336
boost::variant: 1773 ms; S=416666583333336
std::variant: 3989 ms; S=416666583333336
clang++ 5.0.1 -std=c++17 -stdlib=libc++ (Cygwin 64 bit)
-O0
Compile time
variant2 (-DONLY_V2): 1578 ms
boost::variant (-DONLY_BV): 2623 ms
std::variant (-DONLY_SV): 1508 ms
Run time
N=100000000:
prefix: 4447 ms; S=416666583333336
variant2: 16016 ms; S=416666583333336
boost::variant: 42365 ms; S=416666583333336
std::variant: 17817 ms; S=416666583333336
-O1
Compile time
variant2 (-DONLY_V2): 1841 ms
boost::variant (-DONLY_BV): 2919 ms
std::variant (-DONLY_SV): 1776 ms
Run time
N=100000000:
prefix: 1390 ms; S=416666583333336
variant2: 5397 ms; S=416666583333336
boost::variant: 23234 ms; S=416666583333336
std::variant: 2807 ms; S=416666583333336
-O2 -DNDEBUG
Compile time
variant2 (-DONLY_V2): 1766 ms
boost::variant (-DONLY_BV): 2817 ms
std::variant (-DONLY_SV): 1718 ms
Run time
N=100000000:
prefix: 604 ms; S=416666583333336
variant2: 1625 ms; S=416666583333336
boost::variant: 2735 ms; S=416666583333336
std::variant: 2664 ms; S=416666583333336
-O3 -DNDEBUG
Compile time
variant2 (-DONLY_V2): 1720 ms
boost::variant (-DONLY_BV): 2806 ms
std::variant (-DONLY_SV): 1737 ms
Run time
N=100000000:
prefix: 603 ms; S=416666583333336
variant2: 1608 ms; S=416666583333336
boost::variant: 2696 ms; S=416666583333336
std::variant: 2668 ms; S=416666583333336
