Lua vs QT JS

benchmark_scripting.cpp

#include <iostream>
#include <QJSEngine>
#include "sol.hpp" //https://github.com/ThePhD/sol2
#include <benchmark/benchmark.h>

static void QmlFunction(benchmark::State& state) {
  QJSEngine js;
  js.evaluate("function calc(time, value){ return value*2 }");
  QJSValue func = js.evaluate("calc");

  for (auto _ : state) {
    QJSValue result = func.call({QJSValue(1), QJSValue(2)});
    benchmark::DoNotOptimize(result.toNumber());
  }
}
BENCHMARK(QmlFunction);


static void LuaFunction(benchmark::State& state) {

  sol::state lua;
  lua.open_libraries();
  lua.script("function calc(time, value)  return value*2 end");
  sol::function func = lua["calc"];

  for (auto _ : state) {
    sol::function_result result = func(1, 2);
    benchmark::DoNotOptimize(result.get<double>(0));
  }
}
BENCHMARK(LuaFunction);

/*
 * ------------------------------------------------------
Benchmark            Time             CPU   Iterations
------------------------------------------------------
QmlFunction        498 ns          498 ns      1379603
LuaFunction       74.2 ns         74.2 ns      9476946
*/

BENCHMARK_MAIN();