Math.round faster, like 40% or something

round.js

function round(data) {
    if (data < 0) {
        var l = (data + 1 | 0) - data;
        return (l >= 1.0 && l <= 1.5) ? data | 0 : data - 1 | 0;
    }
    
    var l = data | 0;
    return data - l >= 0.5 ? data + 1 | 0 : l;
}