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Minor performance boost

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Jens True
2024-03-19 12:49:14 +00:00
parent 7b09658c25
commit fd91e9b0c1
2 changed files with 47 additions and 40 deletions
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70
composer.lock generated
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@@ -822,21 +822,21 @@
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@@ -872,9 +872,9 @@
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@@ -1287,16 +1287,16 @@
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@@ -1345,20 +1345,20 @@
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@@ -1415,7 +1415,7 @@
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@@ -1423,7 +1423,7 @@
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@@ -1670,16 +1670,16 @@
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@@ -1767,7 +1767,7 @@
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@@ -1934,16 +1934,16 @@
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@@ -1978,7 +1978,7 @@
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@@ -1986,7 +1986,7 @@
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@@ -3661,16 +3661,16 @@
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@@ -3767,7 +3767,7 @@
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17
src/Numerics/GaussianDistribution.php
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@@ -12,6 +12,8 @@ namespace DNW\Skills\Numerics;
*/ */
class GaussianDistribution implements \Stringable class GaussianDistribution implements \Stringable
{ {
private const DEFAULT_STANDARD_DEVIATION = 1.0;
private const DEFAULT_MEAN = 0.0;
/** /**
* Square Root 2π. * Square Root 2π.
* Precalculated constant for performance reasons * Precalculated constant for performance reasons
@@ -32,16 +34,21 @@ class GaussianDistribution implements \Stringable
// precision and precisionMean are used because they make multiplying and dividing simpler // precision and precisionMean are used because they make multiplying and dividing simpler
// (the the accompanying math paper for more details) // (the the accompanying math paper for more details)
private float $precision; private float $precision = 1.0;
private float $precisionMean; private float $precisionMean = 0.0;
private float $variance; private float $variance = 1.0;
public function __construct(private float $mean = 0.0, private float $standardDeviation = 1.0) public function __construct(private float $mean = self::DEFAULT_MEAN, private float $standardDeviation = self::DEFAULT_STANDARD_DEVIATION)
{ {
$this->variance = BasicMath::square($standardDeviation); if($mean == self::DEFAULT_MEAN && $standardDeviation == self::DEFAULT_STANDARD_DEVIATION)
{
//Use all the defaults
return;
}
$this->variance = BasicMath::square($standardDeviation);
if ($this->variance != 0) { if ($this->variance != 0) {
$this->precision = 1.0 / $this->variance; $this->precision = 1.0 / $this->variance;
$this->precisionMean = $this->precision * $this->mean; $this->precisionMean = $this->precision * $this->mean;