int r = 0;

// Find the function id for the function we want to execute.
int functionID = engine->GetFunctionIDByDecl(0, "float testFunc(float)");
if( functionID < 0 )
{
 cout << "Test2() - The function 'float testFunc(float)' was not found." << endl;
 contex->Release();
 return -1;
}
		
timeOut = g_Timer.get() + 5.0;
		
//Operation speed test
OST = g_Timer.get();

int accum = 0;

r = contex->Prepare(functionID);
if( r < 0 ) 
{
 cout << "Test2() - Failed to prepare the context." << endl;
 return -1;
}

for (unsigned int i = 0; i < sz; i++)
{
 contex->SetArgFloat(0, 2.55);

 contex->Execute();
 accum += contex->GetReturnFloat();
}

//Operation speed test
OST = g_Timer.get() - OST;
...

//Operation speed test
OST = g_Timer.get();

//g_scriptMgr.openFunc("testFunc");
//g_scriptMgr.addNumber(2.55);

int accum = 0;

for (unsigned int i = 0; i < sz; i++)
{
 lua_pushstring(m_luaVM, "testFunc"); 
 lua_gettable(m_luaVM, LUA_GLOBALSINDEX); 
 lua_pushnumber(m_luaVM, 2.55);
 lua_call(m_luaVM, 1, 1);
 const double ret = lua_tonumber(m_luaVM, -1);
 lua_pop(m_luaVM, 1);

 accum += ret;
}

//Operation speed test
OST = g_Timer.get() - OST;
...

float testFunc(float inPara) {							  return inPara + inPara;  }

function testFunc(_in)  return _in + _in end