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Created January 24, 2023 17:12
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Decimal Rounding - Number.EPSILON vs Number.EPSILON v2 #jsbench (https://jsbench.github.io/#79ddce0e6d8bbd5c3efdd38d76ae2e35) #jsbench #jsperf
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Decimal Rounding - Number.EPSILON vs Number.EPSILON v2 #jsbench</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
<script src="./suite.js"></script>
</head>
<body>
<h1>Open the console to view the results</h1>
<h2><code>cmd + alt + j</code> or <code>ctrl + alt + j</code></h2>
</body>
</html>
Raw
suite.js
"use strict";
(function (factory) {
if (typeof Benchmark !== "undefined") {
factory(Benchmark);
} else {
factory(require("benchmark"));
}
})(function (Benchmark) {
var suite = new Benchmark.Suite;
Benchmark.prototype.setup = function () {
// Solution 2
var DecimalPrecision2 = (function() {
if (Number.EPSILON === undefined) {
Number.EPSILON = Math.pow(2, -52);
}
if (Math.trunc === undefined) {
Math.trunc = function(v) {
return v < 0 ? Math.ceil(v) : Math.floor(v);
};
}
var powers = [
1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7,
1e8, 1e9, 1e10, 1e11, 1e12, 1e13, 1e14, 1e15,
1e16, 1e17, 1e18, 1e19, 1e20, 1e21, 1e22
];
var intpow10 = function(power) {
/* Not in lookup table */
if (power < 0 || power > 22) {
return Math.pow(10, power);
}
return powers[power];
};
var isRound = function(num, decimalPlaces) {
//return decimalPlaces >= 0 &&
// +num.toFixed(decimalPlaces) === num;
var p = intpow10(decimalPlaces);
return Math.round(num * p) / p === num;
};
var decimalAdjust = function(type, num, decimalPlaces) {
if (type !== 'round' && isRound(num, decimalPlaces || 0))
return num;
var p = intpow10(decimalPlaces || 0);
var n = (num * p) * (1 + Number.EPSILON);
return Math[type](n) / p;
};
return {
// Decimal round (half away from zero)
round: function(num, decimalPlaces) {
return decimalAdjust('round', num, decimalPlaces);
},
// Decimal ceil
ceil: function(num, decimalPlaces) {
return decimalAdjust('ceil', num, decimalPlaces);
},
// Decimal floor
floor: function(num, decimalPlaces) {
return decimalAdjust('floor', num, decimalPlaces);
},
// Decimal trunc
trunc: function(num, decimalPlaces) {
return decimalAdjust('trunc', num, decimalPlaces);
},
// Format using fixed-point notation
toFixed: function(num, decimalPlaces) {
return decimalAdjust('round', num, decimalPlaces).toFixed(decimalPlaces);
}
};
})();
// Solution 2
var DecimalPrecision22 = (function() {
if (Number.EPSILON === undefined) {
Number.EPSILON = Math.pow(2, -52);
}
if (Math.sign === undefined) {
Math.sign = function(x) {
return ((x > 0) - (x < 0)) || +x;
};
}
var powers = [
1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7,
1e8, 1e9, 1e10, 1e11, 1e12, 1e13, 1e14, 1e15,
1e16, 1e17, 1e18, 1e19, 1e20, 1e21, 1e22
];
var intpow10 = function(power) {
if (power < 0 || power > 22) {
return Math.pow(10, power);
}
return powers[power];
};
return {
// Decimal round (half away from zero)
round: function(num, decimalPlaces) {
var p = intpow10(decimalPlaces || 0);
var n = (num * p) * (1 + Number.EPSILON);
return Math.round(n) / p;
},
// Decimal ceil
ceil: function(num, decimalPlaces) {
var p = intpow10(decimalPlaces || 0);
var n = (num * p) * (1 - Math.sign(num) * Number.EPSILON);
return Math.ceil(n) / p;
},
// Decimal floor
floor: function(num, decimalPlaces) {
var p = intpow10(decimalPlaces || 0);
var n = (num * p) * (1 + Math.sign(num) * Number.EPSILON);
return Math.floor(n) / p;
},
// Decimal trunc
trunc: function(num, decimalPlaces) {
//return num < 0 ? ceil(num, decimalPlaces) : floor(num, decimalPlaces);
return (num < 0 ? this.ceil : this.floor)(num, decimalPlaces);
},
// Format using fixed-point notation
toFixed: function(num, decimalPlaces) {
return this.round(num, decimalPlaces).toFixed(decimalPlaces);
}
};
})();
// Solution 2
var DecimalPrecision33 = (function() {
if (Number.EPSILON === undefined) {
Number.EPSILON = Math.pow(2, -52);
}
if (Math.sign === undefined) {
Math.sign = function(x) {
return ((x > 0) - (x < 0)) || +x;
};
}
return {
// Decimal round (half away from zero)
round: function(num, decimalPlaces) {
var p = Math.pow(10, decimalPlaces || 0);
var n = (num * p) * (1 + Number.EPSILON);
return Math.round(n) / p;
},
// Decimal ceil
ceil: function(num, decimalPlaces) {
var p = Math.pow(10, decimalPlaces || 0);
var n = (num * p) * (1 - Math.sign(num) * Number.EPSILON);
return Math.ceil(n) / p;
},
// Decimal floor
floor: function(num, decimalPlaces) {
var p = Math.pow(10, decimalPlaces || 0);
var n = (num * p) * (1 + Math.sign(num) * Number.EPSILON);
return Math.floor(n) / p;
},
// Decimal trunc
trunc: function(num, decimalPlaces) {
//return num < 0 ? ceil(num, decimalPlaces) : floor(num, decimalPlaces);
return (num < 0 ? this.ceil : this.floor)(num, decimalPlaces);
},
// Format using fixed-point notation
toFixed: function(num, decimalPlaces) {
return this.round(num, decimalPlaces).toFixed(decimalPlaces);
}
};
})();
};
suite.add("Solution 2 (Number.EPSILON)", function () {
/** Solution 2 (Number.EPSILON) **/
DecimalPrecision2.round(0.5, 0);
DecimalPrecision2.round(-0.5, 0);
DecimalPrecision2.ceil(1e-8, 2);
DecimalPrecision2.floor(1e-8, 2);
DecimalPrecision2.round(5.12, 1);
DecimalPrecision2.round(-5.12, 1);
DecimalPrecision2.ceil(5.12, 1);
DecimalPrecision2.ceil(-5.12, 1);
DecimalPrecision2.floor(5.12, 1);
DecimalPrecision2.floor(-5.12, 1);
DecimalPrecision2.trunc(5.12, 1);
DecimalPrecision2.trunc(-5.12, 1);
DecimalPrecision2.round(1.005, 2);
DecimalPrecision2.round(39.425, 2);
DecimalPrecision2.round(-1.005, 2);
DecimalPrecision2.round(-39.425, 2);
DecimalPrecision2.ceil(9.130, 2);
DecimalPrecision2.ceil(65.180, 2);
DecimalPrecision2.ceil(-2.260, 2);
DecimalPrecision2.ceil(-18.150, 2);
DecimalPrecision2.floor(2.260, 2);
DecimalPrecision2.floor(18.150, 2);
DecimalPrecision2.floor(-9.130, 2);
DecimalPrecision2.floor(-65.180, 2);
DecimalPrecision2.trunc(2.260, 2);
DecimalPrecision2.trunc(18.150, 2);
DecimalPrecision2.trunc(-2.260, 2);
DecimalPrecision2.trunc(-18.150, 2);
DecimalPrecision2.round(1262.48, -1);
DecimalPrecision2.round(1262.48, -2);
});
suite.add("Solution 22 (Number.EPSILON v2) **/", function () {
/** Solution 22 (Number.EPSILON v2) **/
DecimalPrecision22.round(0.5, 0);
DecimalPrecision22.round(-0.5, 0);
DecimalPrecision22.ceil(1e-8, 2);
DecimalPrecision22.floor(1e-8, 2);
DecimalPrecision22.round(5.12, 1);
DecimalPrecision22.round(-5.12, 1);
DecimalPrecision22.ceil(5.12, 1);
DecimalPrecision22.ceil(-5.12, 1);
DecimalPrecision22.floor(5.12, 1);
DecimalPrecision22.floor(-5.12, 1);
DecimalPrecision22.trunc(5.12, 1);
DecimalPrecision22.trunc(-5.12, 1);
DecimalPrecision22.round(1.005, 2);
DecimalPrecision22.round(39.425, 2);
DecimalPrecision22.round(-1.005, 2);
DecimalPrecision22.round(-39.425, 2);
DecimalPrecision22.ceil(9.130, 2);
DecimalPrecision22.ceil(65.180, 2);
DecimalPrecision22.ceil(-2.260, 2);
DecimalPrecision22.ceil(-18.150, 2);
DecimalPrecision22.floor(2.260, 2);
DecimalPrecision22.floor(18.150, 2);
DecimalPrecision22.floor(-9.130, 2);
DecimalPrecision22.floor(-65.180, 2);
DecimalPrecision22.trunc(2.260, 2);
DecimalPrecision22.trunc(18.150, 2);
DecimalPrecision22.trunc(-2.260, 2);
DecimalPrecision22.trunc(-18.150, 2);
DecimalPrecision22.round(1262.48, -1);
DecimalPrecision22.round(1262.48, -2);
});
suite.add("Solution 33 (Number.EPSILON v3) **/", function () {
/** Solution 33 (Number.EPSILON v3) **/
DecimalPrecision33.round(0.5, 0);
DecimalPrecision33.round(-0.5, 0);
DecimalPrecision33.ceil(1e-8, 2);
DecimalPrecision33.floor(1e-8, 2);
DecimalPrecision33.round(5.12, 1);
DecimalPrecision33.round(-5.12, 1);
DecimalPrecision33.ceil(5.12, 1);
DecimalPrecision33.ceil(-5.12, 1);
DecimalPrecision33.floor(5.12, 1);
DecimalPrecision33.floor(-5.12, 1);
DecimalPrecision33.trunc(5.12, 1);
DecimalPrecision33.trunc(-5.12, 1);
DecimalPrecision33.round(1.005, 2);
DecimalPrecision33.round(39.425, 2);
DecimalPrecision33.round(-1.005, 2);
DecimalPrecision33.round(-39.425, 2);
DecimalPrecision33.ceil(9.130, 2);
DecimalPrecision33.ceil(65.180, 2);
DecimalPrecision33.ceil(-2.260, 2);
DecimalPrecision33.ceil(-18.150, 2);
DecimalPrecision33.floor(2.260, 2);
DecimalPrecision33.floor(18.150, 2);
DecimalPrecision33.floor(-9.130, 2);
DecimalPrecision33.floor(-65.180, 2);
DecimalPrecision33.trunc(2.260, 2);
DecimalPrecision33.trunc(18.150, 2);
DecimalPrecision33.trunc(-2.260, 2);
DecimalPrecision33.trunc(-18.150, 2);
DecimalPrecision33.round(1262.48, -1);
DecimalPrecision33.round(1262.48, -2);
});
suite.on("cycle", function (evt) {
console.log(" - " + evt.target);
});
suite.on("complete", function (evt) {
console.log(new Array(30).join("-"));
var results = evt.currentTarget.sort(function (a, b) {
return b.hz - a.hz;
});
results.forEach(function (item) {
console.log((idx + 1) + ". " + item);
});
});
console.log("Decimal Rounding - Number.EPSILON vs Number.EPSILON v2 #jsbench");
console.log(new Array(30).join("-"));
suite.run();
});
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