SDL Lag / Super slow (SDL 2.0.14) - c++

Question

i have a game loop which measures the ms it takes to finish.
before entering the loop i call a "Init" function which looks like this:
void screen::Init()
{
if(SDL_Init(SDL_INIT_EVERYTHING) == 0)
{
m_window = SDL_CreateWindow("TITLE", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, WIDTH*SIZE, HEIGHT*SIZE, NULL);
m_renderer = SDL_CreateRenderer(m_window, -1, NULL);
if(m_renderer)
SDL_SetRenderDrawColor(m_renderer, 0,0,0,0);
m_Texture = SDL_CreateTexture(m_renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, WIDTH, HEIGHT);
}
}
The thing is that when i call the function one execution of the loop takes 70 to 90 ms!
if i leave the "init" function call out (so no window shown) its only 2-4 ms.
The loop does nothing other than calling one function which looks like the following:
void screen::handleEvents()
{
SDL_PollEvent(&m_event);
switch(m_event.type)
{
case SDL_QUIT:
screen->Clean();
break;
default:
break;
}
}
leaving the handleEvents function out results in 0-2ms, but the window crashes the moment i click on it.
not sure what im doing wrong but im pretty sure it shouldnt slow down to ~10 FPS lol
Here is the rest of the code:
#define SIZE 5
#define WIDTH 150
#define HEIGHT 150
int main(int argc, char* argv[])
{
screen* screen = new class screen;
screen->Init();
while(screen->running)
{
screen->execute();
}
return 0;
}
void screen::execute()
{
if(currline == 1 && Time == 0)
start = SDL_GetTicks();
if(Time > 0)
Time--;
else
counter();
handleEvents();
if(currline == 151 && Time == 0)
{
end = SDL_GetTicks();
printf("s: %8d e: %8d r: %d\n", start, end, end-start);
}
}
void screen::counter()
{
if(currline > 150)
currline = 255;
currline++;
Time = 500;
};

Answer 1

okay, found out why it was lagging:
i was calling handleevent everytime it executed a loop (which is a couple thousand times per second) instead of doing it inside this if statement:
if(currline == 151 && Time == 0)
{
end = SDL_GetTicks();
printf("s: %8d e: %8d r: %d\n", start, end, end-start);
}
the if statement is there to "restrict" the whole thing to a certain framerate :)
usually you would do a sleep at the end of the whole loop to get your 60 executions per second, but since i did it inside this if statment i had to put the function-call in there.