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Commit Graph

1 Commits

Author SHA1 Message Date
Arthur O'Dwyer
87240cf990 Replace std::function with hyper_function for a 37% speedup in compile time.
Before:

    time c++ -O2 -DMAC -I/usr/local/include -std=c++11 -march=native
             -W -Wall -Wextra -Werror -pedantic -Wno-format-pedantic
             -Wno-missing-field-initializers -Wno-unused-parameter
             -DCAP_GLEW=0 -DCAP_PNG=0    -c hyper.cpp -o hyper.o

    real 2m22.508s
    user 2m20.625s
    sys  0m1.648s

After:

    time c++ -O2 -DMAC -I/usr/local/include -std=c++11 -march=native
             -W -Wall -Wextra -Werror -pedantic -Wno-format-pedantic
             -Wno-missing-field-initializers -Wno-unused-parameter
             -DCAP_GLEW=0 -DCAP_PNG=0    -c hyper.cpp -o hyper.o

    real 1m30.515s
    user 1m29.793s
    sys  0m0.689s

Comparing object file size:

    -rw-r--r--  1 ajo  staff  8215036 Jan  5 20:46 old-hyper.o
    -rw-r--r--  1 ajo  staff  7538072 Jan  5 20:47 new-hyper.o

Comparing number of symbols:

    nm old-hyper.o | wc -l  => 12590
    nm new-hyper.o | wc -l  =>  9742

No appreciable difference in link time; the linker takes less than
half a second in either case.
2019-02-06 18:48:53 +01:00