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Created January 24, 2023 17:24
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Decimal Rounding - Number.EPSILON vs Number.EPSILON v2 #jsbench (https://jsbench.github.io/#cf7505d9541dd4210c77dc681d4c6211) #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 4
var DecimalPrecision4 = (function() {
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 toPrecision = function(num, significantDigits) {
// Return early for ±0, NaN and Infinity.
if (!num || !Number.isFinite(num))
return num;
// Compute shift of the decimal point (sf - leftSidedDigits).
var shift = significantDigits - 1 - Math.floor(Math.log10(Math.abs(num)));
// Return if rounding to the same or higher precision.
var decimalPlaces = 0;
for (var p = 1; num != Math.round(num * p) / p; p *= 10) decimalPlaces++;
if (shift >= decimalPlaces)
return num;
// Round to "shift" fractional digits
var scale = intpow10(Math.abs(shift));
return shift > 0 ?
Math.round(num * scale) / scale :
Math.round(num / scale) * scale;
};
// Eliminate binary floating-point inaccuracies.
var stripError = function(num) {
if (Number.isInteger(num))
return num;
return toPrecision(num, 15);
};
var decimalAdjust = function myself(type, num, decimalPlaces) {
if (type === 'round' && num < 0)
return -myself(type, -num, decimalPlaces);
var p = intpow10(decimalPlaces || 0);
var n = stripError(num * p);
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 4
var DecimalPrecision44 = (function() {
if (Math.trunc === undefined) {
Math.trunc = function(v) {
return v < 0 ? Math.ceil(v) : Math.floor(v);
};
}
var toPrecision = function(num, significantDigits) {
// Return early for ±0, NaN and Infinity.
if (!num || !Number.isFinite(num))
return num;
// Compute shift of the decimal point (sf - leftSidedDigits).
var shift = significantDigits - 1 - Math.floor(Math.log10(Math.abs(num)));
// Return if rounding to the same or higher precision.
var decimalPlaces = 0;
for (var p = 1; num != Math.round(num * p) / p; p *= 10) decimalPlaces++;
if (shift >= decimalPlaces)
return num;
// Round to "shift" fractional digits
var scale = Math.pow(10, Math.abs(shift));
return shift > 0 ?
Math.round(num * scale) / scale :
Math.round(num / scale) * scale;
};
// Eliminate binary floating-point inaccuracies.
var stripError = function(num) {
if (Number.isInteger(num))
return num;
return toPrecision(num, 15);
};
var decimalAdjust = function myself(type, num, decimalPlaces) {
if (type === 'round' && num < 0)
return -myself(type, -num, decimalPlaces);
var p = Math.pow(10, decimalPlaces || 0);
var n = stripError(num * p);
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);
}
};
})();
};
suite.add("Solution 4 (Double rounding v2) **/", function () {
/** Solution 4 (Double rounding v2) **/
DecimalPrecision4.round(0.5, 0);
DecimalPrecision4.round(-0.5, 0);
DecimalPrecision4.ceil(1e-8, 2);
DecimalPrecision4.floor(1e-8, 2);
DecimalPrecision4.round(5.12, 1);
DecimalPrecision4.round(-5.12, 1);
DecimalPrecision4.ceil(5.12, 1);
DecimalPrecision4.ceil(-5.12, 1);
DecimalPrecision4.floor(5.12, 1);
DecimalPrecision4.floor(-5.12, 1);
DecimalPrecision4.trunc(5.12, 1);
DecimalPrecision4.trunc(-5.12, 1);
DecimalPrecision4.round(1.005, 2);
DecimalPrecision4.round(39.425, 2);
DecimalPrecision4.round(-1.005, 2);
DecimalPrecision4.round(-39.425, 2);
DecimalPrecision4.ceil(9.130, 2);
DecimalPrecision4.ceil(65.180, 2);
DecimalPrecision4.ceil(-2.260, 2);
DecimalPrecision4.ceil(-18.150, 2);
DecimalPrecision4.floor(2.260, 2);
DecimalPrecision4.floor(18.150, 2);
DecimalPrecision4.floor(-9.130, 2);
DecimalPrecision4.floor(-65.180, 2);
DecimalPrecision4.trunc(2.260, 2);
DecimalPrecision4.trunc(18.150, 2);
DecimalPrecision4.trunc(-2.260, 2);
DecimalPrecision4.trunc(-18.150, 2);
DecimalPrecision4.round(1262.48, -1);
DecimalPrecision4.round(1262.48, -2);
});
suite.add("Solution 44 (Double rounding v2b) **/", function () {
/** Solution 44 (Double rounding v2b) **/
DecimalPrecision44.round(0.5, 0);
DecimalPrecision44.round(-0.5, 0);
DecimalPrecision44.ceil(1e-8, 2);
DecimalPrecision44.floor(1e-8, 2);
DecimalPrecision44.round(5.12, 1);
DecimalPrecision44.round(-5.12, 1);
DecimalPrecision44.ceil(5.12, 1);
DecimalPrecision44.ceil(-5.12, 1);
DecimalPrecision44.floor(5.12, 1);
DecimalPrecision44.floor(-5.12, 1);
DecimalPrecision44.trunc(5.12, 1);
DecimalPrecision44.trunc(-5.12, 1);
DecimalPrecision44.round(1.005, 2);
DecimalPrecision44.round(39.425, 2);
DecimalPrecision44.round(-1.005, 2);
DecimalPrecision44.round(-39.425, 2);
DecimalPrecision44.ceil(9.130, 2);
DecimalPrecision44.ceil(65.180, 2);
DecimalPrecision44.ceil(-2.260, 2);
DecimalPrecision44.ceil(-18.150, 2);
DecimalPrecision44.floor(2.260, 2);
DecimalPrecision44.floor(18.150, 2);
DecimalPrecision44.floor(-9.130, 2);
DecimalPrecision44.floor(-65.180, 2);
DecimalPrecision44.trunc(2.260, 2);
DecimalPrecision44.trunc(18.150, 2);
DecimalPrecision44.trunc(-2.260, 2);
DecimalPrecision44.trunc(-18.150, 2);
DecimalPrecision44.round(1262.48, -1);
DecimalPrecision44.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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