Benchmark::initialize() - Code Metrics - Inspection of "deps" - alecrabbit/php-simple-profiler - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — develop ( d84c4e...84aa32 )

by Alec

created 2019-02-14 13:26 UTC

Benchmark::initialize() A

↳ Parent: Benchmark

Complexity

Conditions	1
Paths	1

Size

Total Lines	10
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	1

Importance

Changes

Metric	Value
cc	1
eloc	7
nc	1
nop	0
dl	0
loc	10
ccs	8
cts	8
cp	1
crap	1
rs	10
c	0
b	0
f	0

<?php

namespace AlecRabbit\Tools;

use AlecRabbit\Accessories\Rewindable;
use AlecRabbit\Tools\Contracts\BenchmarkInterface;
use AlecRabbit\Tools\Contracts\StringsInterface;
use AlecRabbit\Tools\Internal\BenchmarkFunction;
use AlecRabbit\Tools\Reports\Contracts\ReportableInterface;
use AlecRabbit\Tools\Reports\Traits\Reportable;
use AlecRabbit\Tools\Traits\BenchmarkFields;
use function AlecRabbit\typeOf;

class Benchmark implements BenchmarkInterface, ReportableInterface, StringsInterface
{
    use BenchmarkFields, Reportable;

    public const MIN_ITERATIONS = 100;
    public const DEFAULT_STEPS = 100;

    /** @var int */
    protected $advanceSteps = self::DEFAULT_STEPS;
    /** @var int */
    private $functionIndex = 1;
    /** @var Rewindable */
    private $rewindable;
    /** @var int */
    private $iterations;
    /** @var null|string */
    private $comment;
    /** @var string|null */
    private $humanReadableName;
    /** @var int */
    private $totalIterations = 0;
    /** @var null|callable */
    private $onStart;
    /** @var null|callable */
    private $onAdvance;
    /** @var null|callable */
    private $onFinish;
    /** @var int */
    private $advanceStep = 0;
    /** @var \Closure */
    private $generatorFunction;

    /**
     * Benchmark constructor.
     * @param int $iterations
     */
    public function __construct(?int $iterations = null)
    {
        $this->iterations = $this->refineIterations($iterations);

        $this->generatorFunction = function (int $iterations, int $i = 1): \Generator {
            while ($i <= $iterations) {
                yield $i++;
            }
        };

        $this->timer = new Timer();
        $this->initialize();
    }

    private function refineIterations(?int $iterations): int
    {
        $iterations = $iterations ?? self::MIN_ITERATIONS;
        if ($iterations < self::MIN_ITERATIONS) {
            throw new \RuntimeException(__CLASS__ . ': Iterations should greater then ' . self::MIN_ITERATIONS);
        }
        return $iterations;
    }

    /**
     * Resets Benchmark object clear
     */
    private function initialize(): void
    {
        $this->humanReadableName = null;
        $this->rewindable =
            new Rewindable(
                $this->generatorFunction,
                $this->iterations
            );
        $this->functions = [];
        $this->profiler = new Profiler();
    }

    /**
     * Resets Benchmark object clear
     */
    public function reset(): void
    {
        $this->initialize();
    }

    /**
     * Launch benchmarking
     */
    public function run(): Benchmark
    {
        if ($this->onStart) {
            ($this->onStart)();
        }
        $this->execute();
        if ($this->onFinish) {
            ($this->onFinish)();
        }
        return $this;
    }

    /**
     * Benchmarking
     */
    private function execute(): void
    {
        /** @var  BenchmarkFunction $f */
        foreach ($this->functions as $f) {
            if (!$f->execute()) {
                $this->totalIterations -= $this->iterations;
                continue;
            }
            $this->advanceStep = (int)($this->totalIterations / $this->advanceSteps);
            $this->bench($f);
            $this->profiler->counter(self::BENCHMARKED)->bump();
        }
    }

    /**
     * @param BenchmarkFunction $f
     */
    private function bench(BenchmarkFunction $f): void
    {
        $timer = $f->getTimer();
        $function = $f->getCallable();
        $args = $f->getArgs();
        foreach ($this->rewindable as $iteration) {
            $start = microtime(true);
            /** @noinspection DisconnectedForeachInstructionInspection */
            $function(...$args);
            $stop = microtime(true);
            $timer->bounds($start, $stop, $iteration);
            /** @noinspection DisconnectedForeachInstructionInspection */
            $this->progress();
        }
    }

    private function progress(): void
    {
        if ($this->onAdvance && 0 === ++$this->doneIterations % $this->advanceStep) {
            ($this->onAdvance)();
        }
    }

    /**
     * @param callable|null $onStart
     * @param callable|null $onAdvance
     * @param callable|null $onFinish
     * @return Benchmark
     */
    public function progressBar(
        callable $onStart = null,
        callable $onAdvance = null,
        callable $onFinish = null
    ): Benchmark {
        $this->onStart = $onStart;
        $this->onAdvance = $onAdvance;
        $this->onFinish = $onFinish;
        return $this;
    }

    /**
     * @param mixed $func
     * @param mixed ...$args
     */
    public function addFunction($func, ...$args): void
    {
        if (!\is_callable($func, false, $name)) {
            throw new \InvalidArgumentException(
                sprintf(
                    '\'%s\' is NOT callable. Function must be callable. Type of "%s" provided instead.',
                    $name,
                    typeOf($func)
                )
            );
        }
        $function =
            new BenchmarkFunction(
                $func,
                $this->refineName($func, $name),
                $this->functionIndex++,
                $args,
                $this->comment,
                $this->humanReadableName
            );
        $this->functions[$function->enumeratedName()] = $function;
        $this->humanReadableName = null;
        $this->comment = null;
        $this->profiler->counter(self::ADDED)->bump();
        $this->totalIterations += $this->iterations;
    }

    /**
     * @param callable $func
     * @param string $name
     * @return string
     */
    private function refineName($func, $name): string
    {
        if ($func instanceof \Closure) {
            $name = 'λ';
        }
        return $name;
    }

    /**
     * @param string $comment
     * @return Benchmark
     */
    public function withComment(string $comment): self
    {
        $this->comment = $comment;
        return $this;
    }

    /**
     * @param string $name
     * @return Benchmark
     */
    public function useName(string $name): self
    {
        $this->humanReadableName = $name;
        return $this;
    }

    /**
     * @return string
     */
    public function elapsed(): string
    {
        return
            sprintf(
                'Done in: %s',
                $this->getTimer()->elapsed()
            );
    }

    /**
     * {@inheritdoc}
     */
    protected function prepareForReport(): void
    {
        $this->getProfiler()->getReport();
    }
}


1		<?php
2
3		namespace AlecRabbit\Tools;
4
5		use AlecRabbit\Accessories\Rewindable;
6		use AlecRabbit\Tools\Contracts\BenchmarkInterface;
7		use AlecRabbit\Tools\Contracts\StringsInterface;
8		use AlecRabbit\Tools\Internal\BenchmarkFunction;
9		use AlecRabbit\Tools\Reports\Contracts\ReportableInterface;
10		use AlecRabbit\Tools\Reports\Traits\Reportable;
11		use AlecRabbit\Tools\Traits\BenchmarkFields;
12		use function AlecRabbit\typeOf;
13
14		class Benchmark implements BenchmarkInterface, ReportableInterface, StringsInterface
15		{
16		use BenchmarkFields, Reportable;
17
18		public const MIN_ITERATIONS = 100;
19		public const DEFAULT_STEPS = 100;
20
21		/** @var int */
22		protected $advanceSteps = self::DEFAULT_STEPS;
23		/** @var int */
24		private $functionIndex = 1;
25		/** @var Rewindable */
26		private $rewindable;
27		/** @var int */
28		private $iterations;
29		/** @var null\|string */
30		private $comment;
31		/** @var string\|null */
32		private $humanReadableName;
33		/** @var int */
34		private $totalIterations = 0;
35		/** @var null\|callable */
36		private $onStart;
37		/** @var null\|callable */
38		private $onAdvance;
39		/** @var null\|callable */
40		private $onFinish;
41		/** @var int */
42		private $advanceStep = 0;
43		/** @var \Closure */
44		private $generatorFunction;
45
46		/**
47		* Benchmark constructor.
48		* @param int $iterations
49		*/
50	8	public function __construct(?int $iterations = null)
51		{
52	8	$this->iterations = $this->refineIterations($iterations);
53
54		$this->generatorFunction = function (int $iterations, int $i = 1): \Generator {
55	5	while ($i <= $iterations) {
56	5	yield $i++;
57		}
58	5	};
59
60	8	$this->timer = new Timer();
61	8	$this->initialize();
62	8	}
63
64	8	private function refineIterations(?int $iterations): int
65		{
66	8	$iterations = $iterations ?? self::MIN_ITERATIONS;
67	8	if ($iterations < self::MIN_ITERATIONS) {
68	1	throw new \RuntimeException(__CLASS__ . ': Iterations should greater then ' . self::MIN_ITERATIONS);
69		}
70	8	return $iterations;
71		}
72
73		/**
74		* Resets Benchmark object clear
75		*/
76	8	private function initialize(): void
77		{
78	8	$this->humanReadableName = null;
79	8	$this->rewindable =
80	8	new Rewindable(
81	8	$this->generatorFunction,
82	8	$this->iterations
83		);
84	8	$this->functions = [];
85	8	$this->profiler = new Profiler();
86	8	}
87
88		/**
89		* Resets Benchmark object clear
90		*/
91	1	public function reset(): void
92		{
93	1	$this->initialize();
94	1	}
95
96		/**
97		* Launch benchmarking
98		*/
99	5	public function run(): Benchmark
100		{
101	5	if ($this->onStart) {
102	3	($this->onStart)();
103		}
104	5	$this->execute();
105	5	if ($this->onFinish) {
106	4	($this->onFinish)();
107		}
108	5	return $this;
109		}
110
111		/**
112		* Benchmarking
113		*/
114	5	private function execute(): void
115		{
116		/** @var BenchmarkFunction $f */
117	5	foreach ($this->functions as $f) {
118	5	if (!$f->execute()) {
119	2	$this->totalIterations -= $this->iterations;
120	2	continue;
121		}
122	5	$this->advanceStep = (int)($this->totalIterations / $this->advanceSteps);
123	5	$this->bench($f);
124	5	$this->profiler->counter(self::BENCHMARKED)->bump();
125		}
126	5	}
127
128		/**
129		* @param BenchmarkFunction $f
130		*/
131	5	private function bench(BenchmarkFunction $f): void
132		{
133	5	$timer = $f->getTimer();
134	5	$function = $f->getCallable();
135	5	$args = $f->getArgs();
136	5	foreach ($this->rewindable as $iteration) {
137	5	$start = microtime(true);
138		/** @noinspection DisconnectedForeachInstructionInspection */
139	5	$function(...$args);
140	5	$stop = microtime(true);
141	5	$timer->bounds($start, $stop, $iteration);
142		/** @noinspection DisconnectedForeachInstructionInspection */
143	5	$this->progress();
144		}
145	5	}
146
147	5	private function progress(): void
148		{
149	5	if ($this->onAdvance && 0 === ++$this->doneIterations % $this->advanceStep) {
150	4	($this->onAdvance)();
151		}
152	5	}
153
154		/**
155		* @param callable\|null $onStart
156		* @param callable\|null $onAdvance
157		* @param callable\|null $onFinish
158		* @return Benchmark
159		*/
160	4	public function progressBar(
161		callable $onStart = null,
162		callable $onAdvance = null,
163		callable $onFinish = null
164		): Benchmark {
165	4	$this->onStart = $onStart;
166	4	$this->onAdvance = $onAdvance;
167	4	$this->onFinish = $onFinish;
168	4	return $this;
169		}
170
171		/**
172		* @param mixed $func
173		* @param mixed ...$args
174		*/
175	6	public function addFunction($func, ...$args): void
176		{
177	6	if (!\is_callable($func, false, $name)) {
178	1	throw new \InvalidArgumentException(
179	1	sprintf(
180	1	'\'%s\' is NOT callable. Function must be callable. Type of "%s" provided instead.',
181	1	$name,
182	1	typeOf($func)
183		)
184		);
185		}
186		$function =
187	5	new BenchmarkFunction(
188	5	$func,
189	5	$this->refineName($func, $name),
190	5	$this->functionIndex++,
191	5	$args,
192	5	$this->comment,
193	5	$this->humanReadableName
194		);
195	5	$this->functions[$function->enumeratedName()] = $function;
196	5	$this->humanReadableName = null;
197	5	$this->comment = null;
198	5	$this->profiler->counter(self::ADDED)->bump();
199	5	$this->totalIterations += $this->iterations;
200	5	}
201
202		/**
203		* @param callable $func
204		* @param string $name
205		* @return string
206		*/
207	5	private function refineName($func, $name): string
208		{
209	5	if ($func instanceof \Closure) {
210	5	$name = 'λ';
211		}
212	5	return $name;
213		}
214
215		/**
216		* @param string $comment
217		* @return Benchmark
218		*/
219	4	public function withComment(string $comment): self
220		{
221	4	$this->comment = $comment;
222	4	return $this;
223		}
224
225		/**
226		* @param string $name
227		* @return Benchmark
228		*/
229	2	public function useName(string $name): self
230		{
231	2	$this->humanReadableName = $name;
232	2	return $this;
233		}
234
235		/**
236		* @return string
237		*/
238	2	public function elapsed(): string
239		{
240		return
241	2	sprintf(
242	2	'Done in: %s',
243	2	$this->getTimer()->elapsed()
244		);
245		}
246
247		/**
248		* {@inheritdoc}
249		*/
250	4	protected function prepareForReport(): void
251		{
252	4	$this->getProfiler()->getReport();
253	4	}
254		}
255

alecrabbit / php-simple-profiler

Push — develop ( d84c4e...84aa32 )

Benchmark::initialize() A

Complexity

Size

Duplication

Code Coverage

Importance

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