Vector affecting performance in game

[Junyi00]

I am trying to hold a vector of projectiles which then i would loop at the end to draw it. I tried doing so but my game immediately freeze for a second the moment i try to add a projectile in into the vector! I finally realized that its vector.push_back() that is the one causing the weak game performance. I have tried using deque, list but none of them shown any improvement in performance.

if (sf::Keyboard::isKeyPressed(sf::Keyboard::Space)) { // under while (window.isOpen()) {}
    if (player.canShoot) {
        player.shot();//timer related, not causing any issues
        fireball.setStartPos(player.getPos());
        fireball.start();//start animation, not causing issues

        if (pList.size() == 3) { //max 3 projectiles, pList is the vector
            pList.pop_front();
        }
        pList.push_back(fireball); //this causing issues
            
    }
}

Please help!

[DarkRoku12]

if (sf::Keyboard::isKeyPressed(sf::Keyboard::Space))

Be careful with this line, isKeyPressed is dispatched several times even if the key was pressed and released.

Also test performance always in Release mode with all optimizations turned on.

[Junyi00]

Thank lots, everything is fine now. I'm still too new at this

[Hapax]

Since you are using the vector as a queue, you may want to consider using std::queue instead. It works very similarly; you still get to push to the back and pop from the front - that's its sole purpose - and you may very well find it faster.