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I have two functions that do the same thing. Which one is faster?

Black Darkness · 2013-01-04T05:19:27

I want to make my program run faster. I know pointers are quick but does using pointers in this following example increase or decrease speed? If this is faster I plan on doing something similar with all my functions to increase the speed of my program. Example 1. This is the first function returning type Entity. This is the call. *hero = hero->hero_turning(*hero,'d',mv); This is the function Entity Entity::hero_turning(Entity hero, char facing1, vector<Tile> mv) { if (hero.is_swing_hoe == false) { if(hero.facing != facing1) { hero.facing = facing1; hero.wait_time = 0; } else if (hero.can_pass(hero.facing,mv,hero)&& hero.wait_time > 3) { hero.frame = 1; hero.move_animation = true; } } return hero; } Example 2. This one uses pointers and the function is void and doesn't return anything. This is the call. hero->hero_turning(hero,'u',mv); This is the function void Entity::hero_turning(Entity * hero, char facing1, vector<Tile> mv) { if (hero->is_swing_hoe == false) { if(hero->facing != facing1) { hero->facing = facing1; hero->wait_time = 0; } else if (hero->can_pass(hero->facing,mv,*hero)&& hero->wait_time > 3) { hero->frame = 1; hero->move_animation = true; } } }

General and Gameplay Programming Programming

Started by black_darkness January 02, 2013 10:07 AM

18 comments, last by Khatharr 11 years, 3 months ago

Khatharr

8,814

January 04, 2013 05:19 AM

While the philosopher in me applauds your application of the Heisenberg uncertainty principle, you are however blatantly incorrect in this instance.

And the LOL of the day award goes tooooooooooooooo....

Also, I recall from reading the 80386 manual that member offset access is optimized by use of a different addressing method in the hardware. Adding that to the cache I'd imagine that in the majority of cases the value (or call address) is already on hand when required.

void hurrrrrrrr() {__asm sub [ebp+4],5;}

There are ten kinds of people in this world: those who understand binary and those who don't.

I have two functions that do the same thing. Which one is faster?

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I have two functions that do the same thing. Which one is faster?

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