Does having integer calculation improve the performance than real value calculation in JavaScript?

Question

I am experimenting some graphics functions which I learned at the class. In the book, it says that integer calculation improves performance in C++. But I am doing it on JavaScript. Does it matter in Javascript?

On Chrome, it runs smoothly. Not surprisingly, its performance decreases significantly in Firefox 19 and IE10

function circ(cx, cy, rad, color){  //Using second-order differential
            var x = 0;
            var y = rad;
            var d = 1 - rad;
            var deltaE = 3;
            var deltaSE = -2*rad+5;
            ctx.beginPath();
            ctx.strokeStyle = color;
            ptc(cx,cy,x,y);
            while(y>x){
                if(d<0){                //Select E
                    d+=deltaE;
                    deltaE +=2;
                    deltaSE +=2;
                }
                else{                   //Select SE
                    d+=deltaSE;
                    deltaE+=2;
                    deltaSE+=4;
                    y--;
                }
                x++;
                ptc(cx,cy,x,y);
            }
            ctx.stroke();

        }

user1781710 · Accepted Answer · 2013-03-02 21:33:44Z

1

If you are dealing with very large fractions then sure, the simpler the numbers the faster it'll run, but the less smooth any animation based on that number will be.

answered Mar 2, 2013 at 21:33

user1781710

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3 Comments

babuuz Over a year ago

my calculation is based on mouse movement. then integer coordinates of mouse are used only for addition. I guess there is no real value in calculation.

user1781710 Over a year ago

Yeah if you are doing x, y coordinates from mouse movement don't worry about using another other than an integer value.

babuuz Over a year ago

thanks. I was just experimenting this thing. Apparently, the performance of html5 canvas.arc is way better than above function. it is fun, though :)

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