|
1
|
|
|
<?php |
|
2
|
|
|
/* |
|
3
|
|
|
* This file is part of the Execution Speed package. |
|
4
|
|
|
* |
|
5
|
|
|
* (c) Bogdan Koval' <[email protected]> |
|
6
|
|
|
* |
|
7
|
|
|
* For the full copyright and license information, please view the LICENSE |
|
8
|
|
|
* file that was distributed with this source code. |
|
9
|
|
|
*/ |
|
10
|
|
|
|
|
11
|
|
|
declare(strict_types = 1); |
|
12
|
|
|
|
|
13
|
|
|
namespace Bogkov\ExecutionSpeed; |
|
14
|
|
|
|
|
15
|
|
|
use InvalidArgumentException; |
|
16
|
|
|
|
|
17
|
|
|
/** |
|
18
|
|
|
* Class ExecutionSpeed |
|
19
|
|
|
* |
|
20
|
|
|
* @package Bogkov\ExecutionSpeed |
|
21
|
|
|
*/ |
|
22
|
|
|
class ExecutionSpeed |
|
23
|
|
|
{ |
|
24
|
|
|
const MIN_MAX = 5; |
|
25
|
|
|
const MIN_COEFFICIENT = 0.001; |
|
26
|
|
|
|
|
27
|
|
|
/** |
|
28
|
|
|
* @var array |
|
29
|
|
|
*/ |
|
30
|
|
|
protected $stack = []; |
|
31
|
|
|
|
|
32
|
|
|
/** |
|
33
|
|
|
* @var int |
|
34
|
|
|
*/ |
|
35
|
|
|
protected $max = 50; |
|
36
|
|
|
|
|
37
|
|
|
/** |
|
38
|
|
|
* ExecutionSpeed constructor |
|
39
|
|
|
* |
|
40
|
|
|
* @param int $max max |
|
41
|
|
|
* |
|
42
|
|
|
* @throws InvalidArgumentException |
|
43
|
|
|
*/ |
|
44
|
|
|
public function __construct(int $max = 50) |
|
45
|
|
|
{ |
|
46
|
|
|
if (static::MIN_MAX > $max) { |
|
47
|
|
|
throw new InvalidArgumentException('Max must be more than ' . static::MIN_MAX); |
|
48
|
|
|
} |
|
49
|
|
|
|
|
50
|
|
|
$this->max = $max; |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
|
|
/** |
|
54
|
|
|
* @param int $count count |
|
55
|
|
|
* @param int $duration duration |
|
56
|
|
|
* |
|
57
|
|
|
* @return void |
|
58
|
|
|
*/ |
|
59
|
|
|
public function push(int $count, int $duration)/*: void*/ |
|
60
|
|
|
{ |
|
61
|
|
|
\array_unshift( |
|
62
|
|
|
$this->stack, |
|
63
|
|
|
[ |
|
64
|
|
|
$count => $duration, |
|
65
|
|
|
] |
|
66
|
|
|
); |
|
67
|
|
|
|
|
68
|
|
|
$this->stack = \array_slice($this->stack, 0, $this->max); |
|
69
|
|
|
} |
|
70
|
|
|
|
|
71
|
|
|
/** |
|
72
|
|
|
* @param float $coefficient |
|
73
|
|
|
* @param int $precision |
|
74
|
|
|
* |
|
75
|
|
|
* @return float |
|
76
|
|
|
*/ |
|
77
|
|
|
public function getSpeed(float $coefficient = 0.3, int $precision = 1): float |
|
78
|
|
|
{ |
|
79
|
|
|
$coefficients = $this->getCoefficients($coefficient); |
|
80
|
|
|
|
|
81
|
|
|
$result = null; |
|
82
|
|
|
|
|
83
|
|
|
foreach ($this->stack as $index => $item) { |
|
84
|
|
|
$value = key($item) / current($item); |
|
85
|
|
|
$coefficient = $coefficients[$index]; |
|
86
|
|
|
|
|
87
|
|
|
if (null !== $result) { |
|
88
|
|
|
$average = ($result + $value) / 2; |
|
89
|
|
|
$difference = $result - $average; |
|
90
|
|
|
$actualDifference = $difference - $difference * (1 - $coefficient); |
|
91
|
|
|
$value = $result - $actualDifference; |
|
92
|
|
|
} |
|
93
|
|
|
|
|
94
|
|
|
$result = $value; |
|
95
|
|
|
} |
|
96
|
|
|
|
|
97
|
|
|
return \round($result, $precision); |
|
98
|
|
|
} |
|
99
|
|
|
|
|
100
|
|
|
/** |
|
101
|
|
|
* @param float $coefficient coefficient |
|
102
|
|
|
* |
|
103
|
|
|
* @return array |
|
104
|
|
|
*/ |
|
105
|
|
|
protected function getCoefficients(float $coefficient): array |
|
106
|
|
|
{ |
|
107
|
|
|
$value = 1; |
|
108
|
|
|
|
|
109
|
|
|
$coefficients = [ |
|
110
|
|
|
$value, |
|
111
|
|
|
]; |
|
112
|
|
|
|
|
113
|
|
|
$max = $this->max; |
|
114
|
|
|
while (--$max > 0) { |
|
115
|
|
|
$value -= ($coefficient * $value); |
|
116
|
|
|
|
|
117
|
|
|
if (static::MIN_COEFFICIENT >= $value) { |
|
118
|
|
|
$value = static::MIN_COEFFICIENT; |
|
119
|
|
|
} |
|
120
|
|
|
|
|
121
|
|
|
$coefficients[] = $value; |
|
122
|
|
|
} |
|
123
|
|
|
|
|
124
|
|
|
return $coefficients; |
|
125
|
|
|
} |
|
126
|
|
|
} |
bogkov /
execution-speed
