compare.cpp

auto exec_chaiscript() {
    auto opts = {
        chaiscript::Options::No_Load_Modules,
        chaiscript::Options::External_Scripts
    };

    chaiscript::ChaiScript engine({}, {}, opts);
    engine.use("prime.chai");

    auto start = std::chrono::high_resolution_clock::now();

    int primes = engine.eval<int>("primes(10000)");
    auto end = std::chrono::high_resolution_clock::now();

    return std::make_tuple(primes, end - start);
}

auto exec_lua() {
    auto engine = luaL_newstate();
    luaL_dofile(engine, "prime.lua");

    auto start = std::chrono::high_resolution_clock::now();

    lua_getglobal(engine, "primes");
    lua_pushnumber(engine, 10000);
    lua_call(engine, 1, 1);
    int primes = (int) lua_tointeger(engine, -1);
    lua_pop(engine, 1);

    auto end = std::chrono::high_resolution_clock::now();

    lua_close(engine);
    return std::make_tuple(primes, end - start);
}