Difference between revisions of "Speed test"

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Line 22: Line 22:
 
     }
 
     }
 
}
 
}
var c = board.create('curve', JXG.Math.Numerics.bezier(p),{strokecolor:'blue', name:"curve", strokeWidth:5});  
+
var c = board.create('curve', JXG.Math.Numerics.bezier(p),{strokecolor:'blue', name:"curve", strokeWidth:5, lastArrow:true});  
  
 
var count = 0,
 
var count = 0,

Revision as of 11:34, 8 March 2021

Benchmarking the speed of your browser. This application does 1000 updates of a JSXGraph construction. The main cpu work is spent on computing the Bezier curve and plot it and on updating the SVG image of the construction.

Update speed: - fps

The underlying JavaScript code

var board, i, p, col;
board = JXG.JSXGraph.initBoard('box', {boundingbox:[-4,4,4,-4], keepaspectratio:false, axis:true});
p = [];
for (i = 0; i < 2*3 + 1; i++) {
    if (i%3 == 0) {
        col = 'red';
    } else {
        col = 'blue';
    }
    if (i == 0) {
        p.push(board.create('point',[-3,3], {size:8, strokeColor:col, fillColor:col}));
    } else {
        p.push(board.create('point',[Math.random()*8-4,Math.random()*8-4],{size:8, strokeColor:col,fillColor:col}));
    }
}
var c = board.create('curve', JXG.Math.Numerics.bezier(p),{strokecolor:'blue', name:"curve", strokeWidth:5}); 

var count = 0,
    maxcount = 1000,
    sgn = 1,
    startTime = 0;

var unit = function() {
    var len = p.length,
        j = Math.floor(len*Math.random()),
        now;
    p[j].setPosition(JXG.COORDS_BY_USER, [sgn*3*Math.random(), -sgn*3*Math.random()]);
    board.update();
    sgn *= -1;
    count++;
    if (count%100==0) {
        now = new Date();
        document.getElementById('output').innerHTML = "Update speed: " + (Math.round(100*(1000*count/(now.getTime()-startTime.getTime())))/100.0) + ' fps';
    }
    if (count<maxcount)
        setTimeout(unit,0);
    }

var speedtest = function() {
    count = 0;
    startTime = new Date();
    var ti = setTimeout(unit,0);
};

document.getElementById("startbutton").addEventListener('click', speedtest);